diff --git a/.idea/runConfigurations/_trace__filter__array.xml b/.idea/runConfigurations/_trace__filter__array.xml
deleted file mode 100644
index ba1e808..0000000
--- a/.idea/runConfigurations/_trace__filter__array.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] filter::array" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib filter::tests::array" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__filter__example.xml b/.idea/runConfigurations/_trace__filter__example.xml
deleted file mode 100644
index c6f1d22..0000000
--- a/.idea/runConfigurations/_trace__filter__example.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] filter::example" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib filter::tests::example" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__filter__op.xml b/.idea/runConfigurations/_trace__filter__op.xml
deleted file mode 100644
index 52842d0..0000000
--- a/.idea/runConfigurations/_trace__filter__op.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] filter::op" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib filter::tests::op" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__filter__return_type.xml b/.idea/runConfigurations/_trace__filter__return_type.xml
deleted file mode 100644
index 7f2a0cc..0000000
--- a/.idea/runConfigurations/_trace__filter__return_type.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] filter::return_type" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib filter::tests::return_type" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__filter__step_in.xml b/.idea/runConfigurations/_trace__filter__step_in.xml
deleted file mode 100644
index e3bc808..0000000
--- a/.idea/runConfigurations/_trace__filter__step_in.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] filter::step_in" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib filter::tests::step_in" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__parser__parse_array_float.xml b/.idea/runConfigurations/_trace__parser__parse_array_float.xml
deleted file mode 100644
index f912aaa..0000000
--- a/.idea/runConfigurations/_trace__parser__parse_array_float.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] parser::parse_array_float" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib parser::parser::tests::parse_array_float" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__parser__parse_array_sytax.xml b/.idea/runConfigurations/_trace__parser__parse_array_sytax.xml
deleted file mode 100644
index 14e87ff..0000000
--- a/.idea/runConfigurations/_trace__parser__parse_array_sytax.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] parser::parse_array_sytax" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib parser::parser::tests::parse_array_sytax" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/_trace__parser__parse_path.xml b/.idea/runConfigurations/_trace__parser__parse_path.xml
deleted file mode 100644
index c43f72a..0000000
--- a/.idea/runConfigurations/_trace__parser__parse_path.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="[trace] parser::parse_path" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib parser::parser::tests::parse_path" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs>
-      <env name="RUST_LOG" value="trace" />
-    </envs>
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/all.xml b/.idea/runConfigurations/all.xml
index cae146e..cb9472d 100644
--- a/.idea/runConfigurations/all.xml
+++ b/.idea/runConfigurations/all.xml
@@ -1,10 +1,10 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="all" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
     <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib --all" />
+    <option name="command" value="test --package jsonpath_lib" />
     <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
+    <option name="nocapture" value="false" />
+    <option name="backtrace" value="SHORT" />
     <option name="workingDirectory" value="file://$PROJECT_DIR$" />
     <envs />
     <method v="2" />
diff --git a/.idea/runConfigurations/filter.xml b/.idea/runConfigurations/filter.xml
new file mode 100644
index 0000000..157a24b
--- /dev/null
+++ b/.idea/runConfigurations/filter.xml
@@ -0,0 +1,12 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="filter" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="channel" value="DEFAULT" />
+    <option name="command" value="test --package jsonpath_lib --test filter &quot;&quot;" />
+    <option name="allFeatures" value="false" />
+    <option name="nocapture" value="false" />
+    <option name="backtrace" value="SHORT" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <envs />
+    <method v="2" />
+  </configuration>
+</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/filter_all.xml b/.idea/runConfigurations/filter_all.xml
deleted file mode 100644
index 01babd6..0000000
--- a/.idea/runConfigurations/filter_all.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="filter-all" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib filter::tests" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/lib.xml b/.idea/runConfigurations/lib.xml
new file mode 100644
index 0000000..6bd36ec
--- /dev/null
+++ b/.idea/runConfigurations/lib.xml
@@ -0,0 +1,12 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="lib" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="channel" value="DEFAULT" />
+    <option name="command" value="test --package jsonpath_lib --test lib &quot;&quot;" />
+    <option name="allFeatures" value="false" />
+    <option name="nocapture" value="false" />
+    <option name="backtrace" value="SHORT" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <envs />
+    <method v="2" />
+  </configuration>
+</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/parser.xml b/.idea/runConfigurations/parser.xml
new file mode 100644
index 0000000..c7acee9
--- /dev/null
+++ b/.idea/runConfigurations/parser.xml
@@ -0,0 +1,12 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="parser" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="channel" value="DEFAULT" />
+    <option name="command" value="test --package jsonpath_lib --test parser &quot;&quot;" />
+    <option name="allFeatures" value="false" />
+    <option name="nocapture" value="false" />
+    <option name="backtrace" value="SHORT" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <envs />
+    <method v="2" />
+  </configuration>
+</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/parser_all.xml b/.idea/runConfigurations/parser_all.xml
deleted file mode 100644
index a123ded..0000000
--- a/.idea/runConfigurations/parser_all.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="parser-all" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib parser::parser" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/tokenize_all.xml b/.idea/runConfigurations/tokenize_all.xml
deleted file mode 100644
index fed0e31..0000000
--- a/.idea/runConfigurations/tokenize_all.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="tokenize-all" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --lib parser::tokenizer" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="true" />
-    <option name="backtrace" value="NO" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/tokenizer.xml b/.idea/runConfigurations/tokenizer.xml
new file mode 100644
index 0000000..7f7d0e2
--- /dev/null
+++ b/.idea/runConfigurations/tokenizer.xml
@@ -0,0 +1,12 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="tokenizer" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="channel" value="DEFAULT" />
+    <option name="command" value="test --package jsonpath_lib --test tokenizer &quot;&quot;" />
+    <option name="allFeatures" value="false" />
+    <option name="nocapture" value="false" />
+    <option name="backtrace" value="SHORT" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <envs />
+    <method v="2" />
+  </configuration>
+</component>
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index bc75abb..e5b153a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,9 +13,6 @@ matrix:
 
     - rust: stable
       env: RUST_BACKTRACE=1
-      #      addons:
-      #        firefox: latest
-      #        chrome: stable
       before_script:
         - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
         - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
@@ -26,64 +23,21 @@ matrix:
         - cargo test --verbose --all
         - cd wasm
         - wasm-pack build
-#        - wasm-pack test --chrome --firefox --headless
-
-    # Builds with wasm-pack.
-    - rust: beta
-      env: RUST_BACKTRACE=1
-#      addons:
-#        firefox: latest
-#        chrome: stable
-      before_script:
-        - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
-        - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
-        - cargo install-update -a
-        - curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
-      script:
-        - cargo build --verbose --all
-        - cargo test --verbose --all
-        - cd wasm
-        - wasm-pack build
-#        - wasm-pack test --chrome --firefox --headless
-
-    # Builds on nightly.
-    - rust: nightly
-      env: RUST_BACKTRACE=1
-      before_script:
-        - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
-        - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
-        - cargo install-update -a
-        - rustup target add wasm32-unknown-unknown
-      script:
-        - cargo build --verbose --all
-        - cargo test --verbose --all
-        - cd wasm
-        - cargo check
-        - cargo check --target wasm32-unknown-unknown
-        - cargo check                                 --no-default-features
-        - cargo check --target wasm32-unknown-unknown --no-default-features
-        - cargo check                                 --no-default-features --features console_error_panic_hook
-        - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
-        - cargo check                                 --no-default-features --features "console_error_panic_hook wee_alloc"
-        - cargo check --target wasm32-unknown-unknown --no-default-features --features "console_error_panic_hook wee_alloc"
-
-    # Builds on beta.
-    - rust: beta
-      env: RUST_BACKTRACE=1
-      before_script:
-        - (test -x $HOME/.cargo/bin/cargo-install-update || cargo install cargo-update)
-        - (test -x $HOME/.cargo/bin/cargo-generate || cargo install --vers "^0.2" cargo-generate)
-        - cargo install-update -a
-        - rustup target add wasm32-unknown-unknown
-      script:
-        - cargo build --verbose --all
-        - cargo test --verbose --all
-        - cd wasm
-        - cargo check
-        - cargo check --target wasm32-unknown-unknown
-        - cargo check                                 --no-default-features
-        - cargo check --target wasm32-unknown-unknown --no-default-features
-        - cargo check                                 --no-default-features --features console_error_panic_hook
-        - cargo check --target wasm32-unknown-unknown --no-default-features --features console_error_panic_hook
-        # Note: no enabling the `wee_alloc` feature here because it requires
-        # nightly for now.
+    - language: node_js
+        node_js:
+          - 'node'
+          - '11'
+          - '10'
+          - '9'
+          - '8'
+        before_install:
+          - curl https://sh.rustup.rs -sSf > /tmp/rustup.sh
+          - sh /tmp/rustup.sh -y
+          - export PATH="$HOME/.cargo/bin:$PATH"
+          - source "$HOME/.cargo/env"
+          - cd nodejs
+          - node -v
+          - npm -v
+          - npm install
+        script:
+          - npm test
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 72a69ba..af1cabc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,5 +30,5 @@ name = "jsonpath_lib"
 path = "src/lib.rs"
 
 [profile.release]
-debug = true
-lto = false
+#debug = true
+#lto = false
diff --git a/benches/bench.rs b/benches/bench.rs
index cfe1957..be51d33 100644
--- a/benches/bench.rs
+++ b/benches/bench.rs
@@ -15,13 +15,39 @@ fn read_json(path: &str) -> String {
 }
 
 #[bench]
-fn bench_reader(b: &mut Bencher) {
+fn bench_selector(b: &mut Bencher) {
     let string = read_json("./benches/example.json");
+    let path = r#"$..book[?(@.price<30 && @.category=="fiction")]"#;
     let json: Value = serde_json::from_str(string.as_str()).unwrap();
-    let mut reader = jsonpath::reader(json);
+    let mut selector = jsonpath::selector(&json);
     b.iter(move || {
-        for _ in 1..10000 {
-            let _ = reader("$.store").unwrap();
+        for _ in 1..1000 {
+            let _ = selector(path).unwrap();
+        }
+    });
+}
+
+#[bench]
+fn bench_select(b: &mut Bencher) {
+    let string = read_json("./benches/example.json");
+    let path = r#"$..book[?(@.price<30 && @.category=="fiction")]"#;
+    let json: Value = serde_json::from_str(string.as_str()).unwrap();
+    b.iter(move || {
+        for _ in 1..1000 {
+            let _ = jsonpath::select(&json, path).unwrap();
+        }
+    });
+}
+
+#[bench]
+fn bench_compile(b: &mut Bencher) {
+    let string = read_json("./benches/example.json");
+    let path = r#"$..book[?(@.price<30 && @.category=="fiction")]"#;
+    let json: Value = serde_json::from_str(string.as_str()).unwrap();
+    let mut template = jsonpath::compile(path);
+    b.iter(move || {
+        for _ in 1..1000 {
+            let _ = template(&json).unwrap();
         }
     });
 }
\ No newline at end of file
diff --git a/benches/bench_bin/.gitignore b/benches/bench_bin/.gitignore
index bbcdd09..4fbbf9d 100644
--- a/benches/bench_bin/.gitignore
+++ b/benches/bench_bin/.gitignore
@@ -1,4 +1,5 @@
 /target
 **/*.rs.bk
 Cargo.lock
-bin/
\ No newline at end of file
+bin/
+.idea
\ No newline at end of file
diff --git a/benches/bench_bin/.idea/bench_bin.iml b/benches/bench_bin/.idea/bench_bin.iml
new file mode 100644
index 0000000..f270a33
--- /dev/null
+++ b/benches/bench_bin/.idea/bench_bin.iml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/examples" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/benches" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/benches/bench_bin/.idea/encodings.xml b/benches/bench_bin/.idea/encodings.xml
new file mode 100644
index 0000000..15a15b2
--- /dev/null
+++ b/benches/bench_bin/.idea/encodings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
+</project>
\ No newline at end of file
diff --git a/benches/bench_bin/.idea/misc.xml b/benches/bench_bin/.idea/misc.xml
new file mode 100644
index 0000000..6a0d516
--- /dev/null
+++ b/benches/bench_bin/.idea/misc.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CargoProjects">
+    <cargoProject FILE="$PROJECT_DIR$/Cargo.toml" />
+  </component>
+  <component name="RustProjectSettings">
+    <option name="toolchainHomeDirectory" value="$USER_HOME$/.cargo/bin" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/benches/bench_bin/.idea/modules.xml b/benches/bench_bin/.idea/modules.xml
new file mode 100644
index 0000000..e381186
--- /dev/null
+++ b/benches/bench_bin/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/bench_bin.iml" filepath="$PROJECT_DIR$/.idea/bench_bin.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/benches/bench_bin/.idea/vcs.xml b/benches/bench_bin/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/benches/bench_bin/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/benches/bench_bin/.idea/workspace.xml b/benches/bench_bin/.idea/workspace.xml
new file mode 100644
index 0000000..93edc39
--- /dev/null
+++ b/benches/bench_bin/.idea/workspace.xml
@@ -0,0 +1,152 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="3fa6f740-0ee1-4afb-b0ae-9239bf5ced3d" name="Default Changelist" comment="">
+      <change beforePath="$PROJECT_DIR$/../bench.rs" beforeDir="false" afterPath="$PROJECT_DIR$/../bench.rs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main.rs" beforeDir="false" afterPath="$PROJECT_DIR$/src/main.rs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../bench_node_vs_rust.sh" beforeDir="false" afterPath="$PROJECT_DIR$/../bench_node_vs_rust.sh" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../javascript/bench.js" beforeDir="false" afterPath="$PROJECT_DIR$/../javascript/bench.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../../nodejs/lib/index.js" beforeDir="false" afterPath="$PROJECT_DIR$/../../nodejs/lib/index.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/../../nodejs/native/src/lib.rs" beforeDir="false" afterPath="$PROJECT_DIR$/../../nodejs/native/src/lib.rs" afterDir="false" />
+    </list>
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FileEditorManager">
+    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/../.." />
+  </component>
+  <component name="IdeDocumentHistory">
+    <option name="CHANGED_PATHS">
+      <list>
+        <option value="$PROJECT_DIR$/../../src/lib.rs" />
+        <option value="$PROJECT_DIR$/src/main.rs" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectFrameBounds" extendedState="6">
+    <option name="x" value="67" />
+    <option name="y" value="27" />
+    <option name="width" value="1533" />
+    <option name="height" value="1053" />
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
+  <component name="ProjectView">
+    <navigator proportions="" version="1">
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="Scope" />
+      <pane id="PackagesPane" />
+      <pane id="ProjectPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="bench_bin" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bench_bin" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="bench_bin" type="b2602c69:ProjectViewProjectNode" />
+              <item name="bench_bin" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
+    </panes>
+  </component>
+  <component name="PropertiesComponent">
+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
+    <property name="org.rust.cargo.project.model.PROJECT_DISCOVERY" value="true" />
+  </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="SvnConfiguration">
+    <configuration />
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="3fa6f740-0ee1-4afb-b0ae-9239bf5ced3d" name="Default Changelist" comment="" />
+      <created>1552690262696</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1552690262696</updated>
+    </task>
+    <servers />
+  </component>
+  <component name="ToolWindowManager">
+    <frame x="67" y="25" width="1853" height="1055" extended-state="6" />
+    <layout>
+      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.23076923" />
+      <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
+      <window_info id="Designer" order="2" />
+      <window_info id="Favorites" order="3" side_tool="true" />
+      <window_info anchor="bottom" id="Message" order="0" />
+      <window_info anchor="bottom" id="Find" order="1" />
+      <window_info anchor="bottom" id="Run" order="2" weight="0.32829374" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
+      <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
+      <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
+      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info anchor="bottom" id="Version Control" order="7" />
+      <window_info anchor="bottom" id="Terminal" order="8" />
+      <window_info anchor="bottom" id="Event Log" order="9" side_tool="true" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
+      <window_info anchor="right" id="Maven" order="3" />
+      <window_info anchor="right" id="Cargo" order="4" />
+      <window_info anchor="right" id="Palette&#9;" order="5" />
+    </layout>
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/../../src/lib.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="353">
+          <caret line="297" column="1" lean-forward="true" selection-start-line="297" selection-start-column="1" selection-end-line="297" selection-end-column="1" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$USER_HOME$/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.39/src/de.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="279">
+          <caret line="2311" column="47" selection-start-line="2311" selection-start-column="47" selection-end-line="2311" selection-end-column="47" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$USER_HOME$/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/str/mod.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="197">
+          <caret line="3895" column="11" selection-start-line="3895" selection-start-column="11" selection-end-line="3895" selection-end-column="11" />
+          <folding>
+            <element signature="e#126082#126083#0" expanded="true" />
+            <element signature="e#126120#126121#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main.rs">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-680">
+          <caret line="6" column="13" selection-start-line="6" selection-start-column="13" selection-end-line="6" selection-end-column="13" />
+        </state>
+      </provider>
+    </entry>
+  </component>
+</project>
\ No newline at end of file
diff --git a/benches/bench_bin/bench.sh b/benches/bench_bin/bench.sh
index 96a63eb..68ad3cc 100755
--- a/benches/bench_bin/bench.sh
+++ b/benches/bench_bin/bench.sh
@@ -2,7 +2,7 @@
 set -e
 
 if [ -d "target/release" ]; then
-    ./target/release/bench_bin
+    ./target/release/bench_bin $1 $2
 else
     echo "빌드먼저"
 fi
\ No newline at end of file
diff --git a/benches/bench_bin/src/main.rs b/benches/bench_bin/src/main.rs
index 00174f1..85e67bc 100644
--- a/benches/bench_bin/src/main.rs
+++ b/benches/bench_bin/src/main.rs
@@ -4,6 +4,8 @@ extern crate serde_json;
 use serde_json::Value;
 use std::io::Read;
 
+use std::env;
+
 fn read_json(path: &str) -> String {
     let mut f = std::fs::File::open(path).unwrap();
     let mut contents = String::new();
@@ -14,8 +16,33 @@ fn read_json(path: &str) -> String {
 fn main() {
     let string = read_json("../example.json");
     let json: Value = serde_json::from_str(string.as_str()).unwrap();
-    let mut selector = jsonpath::selector(json);
-    for _ in 1..100000 {
-        let _ = selector(r#"$..book[?(@.price<30 && @.category=="fiction")]"#).unwrap();
+    let path = r#"$..book[?(@.price<30 && @.category=="fiction")]"#;
+
+    let args: Vec<String> = env::args().collect();
+    let iter = match &args[2].as_str().parse::<usize>() {
+        Ok(iter) => *iter,
+        _ => 100000
+    };
+
+    match &args[1].as_str() {
+        &"compile" => {
+            let mut template = jsonpath::compile(path);
+            for _ in 1..iter {
+                let _ = template(&json).unwrap();
+            }
+        }
+        &"selector" => {
+            let mut selector = jsonpath::selector(&json);
+            for _ in 1..iter {
+                let _ = selector(path).unwrap();
+            }
+        }
+        &"select" => {
+            let json: Value = serde_json::from_str(string.as_str()).unwrap();
+            for _ in 1..iter {
+                let _ = jsonpath::select(&json, path).unwrap();
+            }
+        }
+        _ => panic!("Invalid argument")
     }
 }
diff --git a/benches/bench_node_vs_rust.sh b/benches/bench_node_vs_rust.sh
index 974760f..b941cb2 100755
--- a/benches/bench_node_vs_rust.sh
+++ b/benches/bench_node_vs_rust.sh
@@ -5,19 +5,42 @@ DIR="$(pwd)"
 
 cd "${DIR}"/bench_bin && cargo build --release
 
-printf "\n\n$..book[?(@.price<30 && @.category=="fiction")] (loop 100,000)"
+ITER=100000
+
+printf "\n\n$..book[?(@.price<30 && @.category=="fiction")] (loop ${ITER})"
 printf "\n\n"
 
-echo "Rust: " && time ./bench.sh
+#echo "Rust - compile: " && time ./bench.sh compile ${ITER}
+#printf "\n"
+#sleep 1
+#echo "Rust - selector: " && time ./bench.sh selector ${ITER}
+#printf "\n"
+#sleep 1
+echo "Rust - select: " && time ./bench.sh select ${ITER}
 printf "\n"
-cd "${DIR}"/javascript && echo "NodeJs - jsonpath module: " && time ./bench.sh jsonpath
+sleep 1
+cd "${DIR}"/javascript && echo "NodeJs - jsonpath: " && time ./bench.sh jsonpath ${ITER}
 printf "\n"
-cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm module - selector: " && time ./bench.sh wasmSelector
+sleep 1
+#cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm - selector: " && time ./bench.sh wasmSelector ${ITER}
+#printf "\n"
+#sleep 1
+#cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm - compile: " && time ./bench.sh wasmCompile ${ITER}
+#printf "\n"
+#sleep 1
+#cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm - compile-alloc: " && time ./bench.sh wasmCompileAlloc ${ITER}
+#printf "\n"
+#sleep 1
+cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm - select:" && time ./bench.sh wasmSelect ${ITER}
 printf "\n"
-cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm module - compile: " && time ./bench.sh wasmCompile
-printf "\n"
-cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm module - compile-alloc: " && time ./bench.sh wasmCompileAlloc
-printf "\n"
-cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm module - select:" && time ./bench.sh wasmSelect
-printf "\n"
-cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm module - select-alloc:" && time ./bench.sh wasmSelectAlloc
\ No newline at end of file
+sleep 1
+#cd "${DIR}"/javascript && echo "NodeJs - jsonpath-wasm - select-alloc:" && time ./bench.sh wasmSelectAlloc ${ITER}
+#printf "\n"
+#sleep 1
+#cd "${DIR}"/javascript && echo "NodeJs - jsonpath-rs - compile:" && time ./bench.sh nativeCompile ${ITER}
+#printf "\n"
+#sleep 1
+#cd "${DIR}"/javascript && echo "NodeJs - jsonpath-rs - selector:" && time ./bench.sh nativeSelector ${ITER}
+#printf "\n"
+#sleep 1
+cd "${DIR}"/javascript && echo "NodeJs - jsonpath-rs - select:" && time ./bench.sh nativeSelect ${ITER}
\ No newline at end of file
diff --git a/benches/javascript/bench.js b/benches/javascript/bench.js
index 4927116..562bea3 100644
--- a/benches/javascript/bench.js
+++ b/benches/javascript/bench.js
@@ -35,40 +35,65 @@ let json = {
     },
     'expensive': 10,
 };
+let jsonStr = JSON.stringify(json);
 
+function getJson() {
+    return JSON.parse(jsonStr);
+}
+const path = '$..book[?(@.price<30 && @.category=="fiction")]';
 const jp = require('jsonpath');
 const jpw = require('@nodejs/jsonpath-wasm');
-const iter = 100000;
+const jpwRs = require('jsonpath-rs');
 
 function jsonpath() {
     for (var i = 0; i < iter; i++) {
-        let _ = jp.query(json, '$..book[?(@.price<30 && @.category=="fiction")]');
+        let _ = jp.query(getJson(), path);
+    }
+}
+
+function nativeCompile() {
+    let template = jpwRs.compile(path);
+    for (var i = 0; i < iter; i++) {
+        let _ = template(JSON.stringify(json));
+    }
+}
+
+function nativeSelector() {
+    let selector = jpwRs.selector(getJson());
+    for (var i = 0; i < iter; i++) {
+        let _ = selector(path);
+    }
+}
+
+function nativeSelect() {
+    for (var i = 0; i < iter; i++) {
+        let _ = jpwRs.select(JSON.stringify(json), path);
     }
 }
 
 function wasmSelector() {
-    let selector = jpw.selector(json);
+    let selector = jpw.selector(getJson());
     for (var i = 0; i < iter; i++) {
-        let _ = selector('$..book[?(@.price<30 && @.category=="fiction")]');
+        let _ = selector(path);
     }
 }
 
 function wasmCompile() {
-    let template = jpw.compile('$..book[?(@.price<30 && @.category=="fiction")]');
+    let template = jpw.compile(path);
     for (var i = 0; i < iter; i++) {
-        let _ = template(json);
+        let _ = template(getJson());
     }
 }
 
 function wasmCompileAlloc() {
-    let ptr = jpw.alloc_json(json);
+    let ptr = jpw.alloc_json(getJson());
     if (ptr == 0) {
         console.error('Invalid pointer');
         return;
     }
 
     try {
-        let template = jpw.compile('$..book[?(@.price<30 && @.category=="fiction")]');
+        let template = jpw.compile(path);
         for (var i = 0; i < iter; i++) {
             let _ = template(ptr);
         }
@@ -79,12 +104,12 @@ function wasmCompileAlloc() {
 
 function wasmSelect() {
     for (var i = 0; i < iter; i++) {
-        let _ = jpw.select(json, '$..book[?(@.price<30 && @.category=="fiction")]');
+        let _ = jpw.select(getJson(), path);
     }
 }
 
 function wasmSelectAlloc() {
-    let ptr = jpw.alloc_json(json);
+    let ptr = jpw.alloc_json(getJson());
     if (ptr == 0) {
         console.error('Invalid pointer');
         return;
@@ -92,33 +117,13 @@ function wasmSelectAlloc() {
 
     try {
         for (var i = 0; i < iter; i++) {
-            let _ = jpw.select(ptr, '$..book[?(@.price<30 && @.category=="fiction")]');
+            let _ = jpw.select(ptr, path);
         }
     } finally {
         jpw.dealloc_json(ptr);
     }
 }
 
-let functionName = process.argv[2];
-
-switch (functionName) {
-    case 'jsonpath':
-        jsonpath();
-        break;
-    case 'wasmSelector':
-        wasmSelector();
-        break;
-    case 'wasmCompile':
-        wasmCompile();
-        break;
-    case 'wasmSelect':
-        wasmSelect();
-        break;
-    case 'wasmCompileAlloc':
-        wasmCompileAlloc();
-        break;
-    case 'wasmSelectAlloc':
-        wasmSelectAlloc();
-    default:
-        console.error('Invalid function name');
-}
+const functionName = process.argv[2];
+const iter = parseInt(process.argv[3], 10);
+eval(functionName + "()");
\ No newline at end of file
diff --git a/benches/javascript/bench.sh b/benches/javascript/bench.sh
index 36f0194..8bfd5c0 100755
--- a/benches/javascript/bench.sh
+++ b/benches/javascript/bench.sh
@@ -1,2 +1,2 @@
 #!/bin/bash
-node bench.js $1
+node bench.js $1 $2
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..a229421
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+set -e
+
+# project_root
+DIR="$(pwd)"
+WASM="${DIR}"/wasm
+WASM_WWW="${WASM}"/www
+WASM_WWW_BENCH="${WASM}"/www_bench
+WASM_BROWSER_PKG="${WASM}"/browser_pkg
+WASM_NODEJS_PKG="${WASM}"/nodejs_pkg
+BENCHES="${DIR}"/benches
+BENCHES_JS="${BENCHES}"/javascript
+NODEJS="${DIR}"/nodejs
+DOCS="${DIR}"/docs
+DOCS_BENCH="${DOCS}"/bench
+
+__msg () {
+    echo ">>>>>>>>>>$1<<<<<<<<<<"
+}
+
+__cargo_clean () {
+    cd "${BENCHES}"/bench_bin && cargo clean && \
+        cd "${NODEJS}"/native && cargo clean && \
+        cd "${WASM}" && cargo clean && \
+        cd "${DIR}" && cargo clean
+}
+
+echo
+__msg "clean"
+rm -rf \
+    "${WASM_NODEJS_PKG}" \
+    "${WASM_BROWSER_PKG}" \
+    "${BENCHES_JS}"/node_modules \
+    "${NODEJS}"/node_modules \
+    "${WASM_WWW}"/node_modules \
+    "${WASM_WWW_BENCH}"/node_modules \
+    "${WASM_WWW}"/dist \
+    "${WASM_WWW_BENCH}"/dist
+
+if [ "$1" = "all" ]; then
+    __msg "clean targets"
+    __cargo_clean
+fi
+
+__msg "npm install"
+echo
+cd "${WASM_WWW}" && npm install
+cd "${WASM_WWW_BENCH}" && npm install
+cd "${NODEJS}" && npm install
+cd "${BENCHES_JS}" && npm install
+
+echo
+echo
+__msg "wasm-pack"
+cd "${WASM}" && \
+    wasm-pack build --target=nodejs --scope nodejs --out-dir nodejs_pkg && \
+    cd "${WASM_NODEJS_PKG}" && npm link
+
+cd "${WASM}" && \
+    wasm-pack build --target=browser --scope browser --out-dir browser_pkg && \
+    cd "${WASM_BROWSER_PKG}" && npm link
+
+echo
+__msg "link"
+cd "${WASM_WWW}" && \
+    npm link @browser/jsonpath-wasm
+
+cd "${WASM_WWW_BENCH}" && \
+    npm link @browser/jsonpath-wasm
+
+cd "${BENCHES_JS}" && \
+    npm link @nodejs/jsonpath-wasm && \
+    npm link jsonpath-rs
+
+echo
+__msg "docs"
+cd "${WASM_WWW}" && \
+    npm run build &&
+    rm -f "${DOCS}"/*.js "${DOCS}"/*.wasm "${DOCS}"/*.html && \
+    cp "${WASM_WWW}"/dist/*.* "${DOCS}"/
+
+cd "${WASM_WWW_BENCH}" && \
+    npm run build &&
+    rm -f "${DOCS_BENCH}"/*.js "${DOCS_BENCH}"/*.wasm "${DOCS_BENCH}"/*.html && \
+    cp "${WASM_WWW_BENCH}"/dist/*.* "${DOCS_BENCH}"/
+
+__msg "done"
diff --git a/docs/0.bootstrap.js b/docs/0.bootstrap.js
index 24514ce..d8c210e 100644
--- a/docs/0.bootstrap.js
+++ b/docs/0.bootstrap.js
@@ -4,11 +4,11 @@
 /*!***************************************!*\
   !*** ../browser_pkg/jsonpath_wasm.js ***!
   \***************************************/
-/*! exports provided: alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __widl_f_log_1_, __wbindgen_string_new, __wbindgen_number_get, __wbindgen_is_string, __wbindgen_string_get, __wbindgen_cb_forget, __wbindgen_json_parse, __wbindgen_json_serialize, __wbindgen_closure_wrapper101, __wbindgen_closure_wrapper103, __wbindgen_object_clone_ref, __wbindgen_object_drop_ref, __wbindgen_throw */
+/*! exports provided: alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __widl_f_log_1_, __wbindgen_object_clone_ref, __wbindgen_object_drop_ref, __wbindgen_string_new, __wbindgen_number_get, __wbindgen_is_string, __wbindgen_string_get, __wbindgen_cb_forget, __wbindgen_json_parse, __wbindgen_json_serialize, __wbindgen_closure_wrapper99, __wbindgen_closure_wrapper101, __wbindgen_throw */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
-eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"alloc_json\", function() { return alloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"dealloc_json\", function() { return dealloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"compile\", function() { return compile; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"reader\", function() { return reader; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"selector\", function() { return selector; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"select\", function() { return select; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"read\", function() { return read; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"testa\", function() { return testa; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__widl_f_log_1_\", function() { return __widl_f_log_1_; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_new\", function() { return __wbindgen_string_new; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_number_get\", function() { return __wbindgen_number_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_is_string\", function() { return __wbindgen_is_string; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_get\", function() { return __wbindgen_string_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_cb_forget\", function() { return __wbindgen_cb_forget; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_parse\", function() { return __wbindgen_json_parse; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_serialize\", function() { return __wbindgen_json_serialize; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper101\", function() { return __wbindgen_closure_wrapper101; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper103\", function() { return __wbindgen_closure_wrapper103; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_clone_ref\", function() { return __wbindgen_object_clone_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_drop_ref\", function() { return __wbindgen_object_drop_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_throw\", function() { return __wbindgen_throw; });\n/* harmony import */ var _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./jsonpath_wasm_bg */ \"../browser_pkg/jsonpath_wasm_bg.wasm\");\n/* tslint:disable */\n\n\nconst heap = new Array(32);\n\nheap.fill(undefined);\n\nheap.push(undefined, null, true, false);\n\nlet heap_next = heap.length;\n\nfunction addHeapObject(obj) {\n    if (heap_next === heap.length) heap.push(heap.length + 1);\n    const idx = heap_next;\n    heap_next = heap[idx];\n\n    heap[idx] = obj;\n    return idx;\n}\n/**\n* @param {any} arg0\n* @returns {number}\n*/\nfunction alloc_json(arg0) {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"alloc_json\"](addHeapObject(arg0));\n}\n\n/**\n* @param {number} arg0\n* @returns {boolean}\n*/\nfunction dealloc_json(arg0) {\n    return (_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"dealloc_json\"](arg0)) !== 0;\n}\n\nlet cachedTextEncoder = new TextEncoder('utf-8');\n\nlet cachegetUint8Memory = null;\nfunction getUint8Memory() {\n    if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint8Memory = new Uint8Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint8Memory;\n}\n\nlet WASM_VECTOR_LEN = 0;\n\nlet passStringToWasm;\nif (typeof cachedTextEncoder.encodeInto === 'function') {\n    passStringToWasm = function(arg) {\n\n        let size = arg.length;\n        let ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_malloc\"](size);\n        let writeOffset = 0;\n        while (true) {\n            const view = getUint8Memory().subarray(ptr + writeOffset, ptr + size);\n            const { read, written } = cachedTextEncoder.encodeInto(arg, view);\n            arg = arg.substring(read);\n            writeOffset += written;\n            if (arg.length === 0) {\n                break;\n            }\n            ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_realloc\"](ptr, size, size * 2);\n            size *= 2;\n        }\n        WASM_VECTOR_LEN = writeOffset;\n        return ptr;\n    };\n} else {\n    passStringToWasm = function(arg) {\n\n        const buf = cachedTextEncoder.encode(arg);\n        const ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_malloc\"](buf.length);\n        getUint8Memory().set(buf, ptr);\n        WASM_VECTOR_LEN = buf.length;\n        return ptr;\n    };\n}\n\nfunction getObject(idx) { return heap[idx]; }\n\nfunction dropObject(idx) {\n    if (idx < 36) return;\n    heap[idx] = heap_next;\n    heap_next = idx;\n}\n\nfunction takeObject(idx) {\n    const ret = getObject(idx);\n    dropObject(idx);\n    return ret;\n}\n/**\n* @param {string} arg0\n* @returns {any}\n*/\nfunction compile(arg0) {\n    const ptr0 = passStringToWasm(arg0);\n    const len0 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"compile\"](ptr0, len0));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr0, len0 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use selector\n*\n* @param {any} arg0\n* @returns {any}\n*/\nfunction reader(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"reader\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @returns {any}\n*/\nfunction selector(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"selector\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction select(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"select\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use select\n*\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction read(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"read\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n* @returns {void}\n*/\nfunction testa() {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"testa\"]();\n}\n\nfunction __widl_f_log_1_(arg0) {\n    console.log(getObject(arg0));\n}\n\nlet cachedTextDecoder = new TextDecoder('utf-8');\n\nfunction getStringFromWasm(ptr, len) {\n    return cachedTextDecoder.decode(getUint8Memory().subarray(ptr, ptr + len));\n}\n\nfunction __wbindgen_string_new(p, l) { return addHeapObject(getStringFromWasm(p, l)); }\n\nfunction __wbindgen_number_get(n, invalid) {\n    let obj = getObject(n);\n    if (typeof(obj) === 'number') return obj;\n    getUint8Memory()[invalid] = 1;\n    return 0;\n}\n\nfunction __wbindgen_is_string(i) { return typeof(getObject(i)) === 'string' ? 1 : 0; }\n\nlet cachegetUint32Memory = null;\nfunction getUint32Memory() {\n    if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint32Memory = new Uint32Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint32Memory;\n}\n\nfunction __wbindgen_string_get(i, len_ptr) {\n    let obj = getObject(i);\n    if (typeof(obj) !== 'string') return 0;\n    const ptr = passStringToWasm(obj);\n    getUint32Memory()[len_ptr / 4] = WASM_VECTOR_LEN;\n    return ptr;\n}\n\nconst __wbindgen_cb_forget = dropObject;\n\nfunction __wbindgen_json_parse(ptr, len) { return addHeapObject(JSON.parse(getStringFromWasm(ptr, len))); }\n\nfunction __wbindgen_json_serialize(idx, ptrptr) {\n    const ptr = passStringToWasm(JSON.stringify(getObject(idx)));\n    getUint32Memory()[ptrptr / 4] = ptr;\n    return WASM_VECTOR_LEN;\n}\n\nfunction __wbindgen_closure_wrapper101(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(16);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(17);\n    const cb = function(arg0) {\n        this.cnt++;\n        try {\n            return takeObject(f(this.a, b, addHeapObject(arg0)));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_closure_wrapper103(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(14);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(15);\n    const cb = function(arg0) {\n        this.cnt++;\n        const ptr0 = passStringToWasm(arg0);\n        const len0 = WASM_VECTOR_LEN;\n        try {\n            return takeObject(f(this.a, b, ptr0, len0));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_object_clone_ref(idx) {\n    return addHeapObject(getObject(idx));\n}\n\nfunction __wbindgen_object_drop_ref(i) { dropObject(i); }\n\nfunction __wbindgen_throw(ptr, len) {\n    throw new Error(getStringFromWasm(ptr, len));\n}\n\n\n\n//# sourceURL=webpack:///../browser_pkg/jsonpath_wasm.js?");
+eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"alloc_json\", function() { return alloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"dealloc_json\", function() { return dealloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"compile\", function() { return compile; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"reader\", function() { return reader; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"selector\", function() { return selector; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"select\", function() { return select; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"read\", function() { return read; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"testa\", function() { return testa; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__widl_f_log_1_\", function() { return __widl_f_log_1_; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_clone_ref\", function() { return __wbindgen_object_clone_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_drop_ref\", function() { return __wbindgen_object_drop_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_new\", function() { return __wbindgen_string_new; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_number_get\", function() { return __wbindgen_number_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_is_string\", function() { return __wbindgen_is_string; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_get\", function() { return __wbindgen_string_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_cb_forget\", function() { return __wbindgen_cb_forget; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_parse\", function() { return __wbindgen_json_parse; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_serialize\", function() { return __wbindgen_json_serialize; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper99\", function() { return __wbindgen_closure_wrapper99; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper101\", function() { return __wbindgen_closure_wrapper101; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_throw\", function() { return __wbindgen_throw; });\n/* harmony import */ var _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./jsonpath_wasm_bg */ \"../browser_pkg/jsonpath_wasm_bg.wasm\");\n/* tslint:disable */\n\n\nconst heap = new Array(32);\n\nheap.fill(undefined);\n\nheap.push(undefined, null, true, false);\n\nlet heap_next = heap.length;\n\nfunction addHeapObject(obj) {\n    if (heap_next === heap.length) heap.push(heap.length + 1);\n    const idx = heap_next;\n    heap_next = heap[idx];\n\n    heap[idx] = obj;\n    return idx;\n}\n/**\n* @param {any} arg0\n* @returns {number}\n*/\nfunction alloc_json(arg0) {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"alloc_json\"](addHeapObject(arg0));\n}\n\n/**\n* @param {number} arg0\n* @returns {boolean}\n*/\nfunction dealloc_json(arg0) {\n    return (_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"dealloc_json\"](arg0)) !== 0;\n}\n\nlet cachedTextEncoder = new TextEncoder('utf-8');\n\nlet cachegetUint8Memory = null;\nfunction getUint8Memory() {\n    if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint8Memory = new Uint8Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint8Memory;\n}\n\nlet WASM_VECTOR_LEN = 0;\n\nfunction passStringToWasm(arg) {\n\n    const buf = cachedTextEncoder.encode(arg);\n    const ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_malloc\"](buf.length);\n    getUint8Memory().set(buf, ptr);\n    WASM_VECTOR_LEN = buf.length;\n    return ptr;\n}\n\nfunction getObject(idx) { return heap[idx]; }\n\nfunction dropObject(idx) {\n    if (idx < 36) return;\n    heap[idx] = heap_next;\n    heap_next = idx;\n}\n\nfunction takeObject(idx) {\n    const ret = getObject(idx);\n    dropObject(idx);\n    return ret;\n}\n/**\n* @param {string} arg0\n* @returns {any}\n*/\nfunction compile(arg0) {\n    const ptr0 = passStringToWasm(arg0);\n    const len0 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"compile\"](ptr0, len0));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr0, len0 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use selector\n*\n* @param {any} arg0\n* @returns {any}\n*/\nfunction reader(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"reader\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @returns {any}\n*/\nfunction selector(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"selector\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction select(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"select\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use select\n*\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction read(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"read\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n* @returns {void}\n*/\nfunction testa() {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"testa\"]();\n}\n\nfunction __widl_f_log_1_(arg0) {\n    console.log(getObject(arg0));\n}\n\nfunction __wbindgen_object_clone_ref(idx) {\n    return addHeapObject(getObject(idx));\n}\n\nfunction __wbindgen_object_drop_ref(i) { dropObject(i); }\n\nlet cachedTextDecoder = new TextDecoder('utf-8');\n\nfunction getStringFromWasm(ptr, len) {\n    return cachedTextDecoder.decode(getUint8Memory().subarray(ptr, ptr + len));\n}\n\nfunction __wbindgen_string_new(p, l) {\n    return addHeapObject(getStringFromWasm(p, l));\n}\n\nfunction __wbindgen_number_get(n, invalid) {\n    let obj = getObject(n);\n    if (typeof(obj) === 'number') return obj;\n    getUint8Memory()[invalid] = 1;\n    return 0;\n}\n\nfunction __wbindgen_is_string(i) {\n    return typeof(getObject(i)) === 'string' ? 1 : 0;\n}\n\nlet cachegetUint32Memory = null;\nfunction getUint32Memory() {\n    if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint32Memory = new Uint32Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint32Memory;\n}\n\nfunction __wbindgen_string_get(i, len_ptr) {\n    let obj = getObject(i);\n    if (typeof(obj) !== 'string') return 0;\n    const ptr = passStringToWasm(obj);\n    getUint32Memory()[len_ptr / 4] = WASM_VECTOR_LEN;\n    return ptr;\n}\n\nconst __wbindgen_cb_forget = dropObject;\n\nfunction __wbindgen_json_parse(ptr, len) {\n    return addHeapObject(JSON.parse(getStringFromWasm(ptr, len)));\n}\n\nfunction __wbindgen_json_serialize(idx, ptrptr) {\n    const ptr = passStringToWasm(JSON.stringify(getObject(idx)));\n    getUint32Memory()[ptrptr / 4] = ptr;\n    return WASM_VECTOR_LEN;\n}\n\nfunction __wbindgen_closure_wrapper99(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(14);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(15);\n    const cb = function(arg0) {\n        this.cnt++;\n        try {\n            return takeObject(f(this.a, b, addHeapObject(arg0)));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_closure_wrapper101(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(16);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(17);\n    const cb = function(arg0) {\n        this.cnt++;\n        const ptr0 = passStringToWasm(arg0);\n        const len0 = WASM_VECTOR_LEN;\n        try {\n            return takeObject(f(this.a, b, ptr0, len0));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_throw(ptr, len) {\n    throw new Error(getStringFromWasm(ptr, len));\n}\n\n\n\n//# sourceURL=webpack:///../browser_pkg/jsonpath_wasm.js?");
 
 /***/ }),
 
@@ -16,7 +16,7 @@ eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export (binding) *
 /*!********************************************!*\
   !*** ../browser_pkg/jsonpath_wasm_bg.wasm ***!
   \********************************************/
-/*! exports provided: memory, alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __wbindgen_malloc, __wbindgen_realloc, __wbindgen_free, __wbg_function_table */
+/*! exports provided: memory, alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __wbindgen_malloc, __wbindgen_free, __wbg_function_table */
 /***/ (function(module, exports, __webpack_require__) {
 
 eval("\"use strict\";\n// Instantiate WebAssembly module\nvar wasmExports = __webpack_require__.w[module.i];\n__webpack_require__.r(exports);\n// export exports from WebAssembly module\nfor(var name in wasmExports) if(name != \"__webpack_init__\") exports[name] = wasmExports[name];\n// exec imports from WebAssembly module (for esm order)\n/* harmony import */ var m0 = __webpack_require__(/*! ./jsonpath_wasm */ \"../browser_pkg/jsonpath_wasm.js\");\n\n\n// exec wasm module\nwasmExports[\"__webpack_init__\"]()\n\n//# sourceURL=webpack:///../browser_pkg/jsonpath_wasm_bg.wasm?");
diff --git a/docs/9a826648f4cbc2bc8591.module.wasm b/docs/9a826648f4cbc2bc8591.module.wasm
deleted file mode 100644
index b09af39..0000000
Binary files a/docs/9a826648f4cbc2bc8591.module.wasm and /dev/null differ
diff --git a/docs/bench/0.bootstrap.js b/docs/bench/0.bootstrap.js
index f43bb0e..30b16e0 100644
--- a/docs/bench/0.bootstrap.js
+++ b/docs/bench/0.bootstrap.js
@@ -4,11 +4,11 @@
 /*!***************************************!*\
   !*** ../browser_pkg/jsonpath_wasm.js ***!
   \***************************************/
-/*! exports provided: alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __widl_f_log_1_, __wbindgen_string_new, __wbindgen_number_get, __wbindgen_is_string, __wbindgen_string_get, __wbindgen_cb_forget, __wbindgen_json_parse, __wbindgen_json_serialize, __wbindgen_closure_wrapper101, __wbindgen_closure_wrapper103, __wbindgen_object_clone_ref, __wbindgen_object_drop_ref, __wbindgen_throw */
+/*! exports provided: alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __widl_f_log_1_, __wbindgen_object_clone_ref, __wbindgen_object_drop_ref, __wbindgen_string_new, __wbindgen_number_get, __wbindgen_is_string, __wbindgen_string_get, __wbindgen_cb_forget, __wbindgen_json_parse, __wbindgen_json_serialize, __wbindgen_closure_wrapper99, __wbindgen_closure_wrapper101, __wbindgen_throw */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
-eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"alloc_json\", function() { return alloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"dealloc_json\", function() { return dealloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"compile\", function() { return compile; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"reader\", function() { return reader; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"selector\", function() { return selector; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"select\", function() { return select; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"read\", function() { return read; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"testa\", function() { return testa; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__widl_f_log_1_\", function() { return __widl_f_log_1_; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_new\", function() { return __wbindgen_string_new; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_number_get\", function() { return __wbindgen_number_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_is_string\", function() { return __wbindgen_is_string; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_get\", function() { return __wbindgen_string_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_cb_forget\", function() { return __wbindgen_cb_forget; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_parse\", function() { return __wbindgen_json_parse; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_serialize\", function() { return __wbindgen_json_serialize; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper101\", function() { return __wbindgen_closure_wrapper101; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper103\", function() { return __wbindgen_closure_wrapper103; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_clone_ref\", function() { return __wbindgen_object_clone_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_drop_ref\", function() { return __wbindgen_object_drop_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_throw\", function() { return __wbindgen_throw; });\n/* harmony import */ var _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./jsonpath_wasm_bg */ \"../browser_pkg/jsonpath_wasm_bg.wasm\");\n/* tslint:disable */\n\n\nconst heap = new Array(32);\n\nheap.fill(undefined);\n\nheap.push(undefined, null, true, false);\n\nlet heap_next = heap.length;\n\nfunction addHeapObject(obj) {\n    if (heap_next === heap.length) heap.push(heap.length + 1);\n    const idx = heap_next;\n    heap_next = heap[idx];\n\n    heap[idx] = obj;\n    return idx;\n}\n/**\n* @param {any} arg0\n* @returns {number}\n*/\nfunction alloc_json(arg0) {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"alloc_json\"](addHeapObject(arg0));\n}\n\n/**\n* @param {number} arg0\n* @returns {boolean}\n*/\nfunction dealloc_json(arg0) {\n    return (_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"dealloc_json\"](arg0)) !== 0;\n}\n\nlet cachedTextEncoder = new TextEncoder('utf-8');\n\nlet cachegetUint8Memory = null;\nfunction getUint8Memory() {\n    if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint8Memory = new Uint8Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint8Memory;\n}\n\nlet WASM_VECTOR_LEN = 0;\n\nlet passStringToWasm;\nif (typeof cachedTextEncoder.encodeInto === 'function') {\n    passStringToWasm = function(arg) {\n\n        let size = arg.length;\n        let ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_malloc\"](size);\n        let writeOffset = 0;\n        while (true) {\n            const view = getUint8Memory().subarray(ptr + writeOffset, ptr + size);\n            const { read, written } = cachedTextEncoder.encodeInto(arg, view);\n            arg = arg.substring(read);\n            writeOffset += written;\n            if (arg.length === 0) {\n                break;\n            }\n            ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_realloc\"](ptr, size, size * 2);\n            size *= 2;\n        }\n        WASM_VECTOR_LEN = writeOffset;\n        return ptr;\n    };\n} else {\n    passStringToWasm = function(arg) {\n\n        const buf = cachedTextEncoder.encode(arg);\n        const ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_malloc\"](buf.length);\n        getUint8Memory().set(buf, ptr);\n        WASM_VECTOR_LEN = buf.length;\n        return ptr;\n    };\n}\n\nfunction getObject(idx) { return heap[idx]; }\n\nfunction dropObject(idx) {\n    if (idx < 36) return;\n    heap[idx] = heap_next;\n    heap_next = idx;\n}\n\nfunction takeObject(idx) {\n    const ret = getObject(idx);\n    dropObject(idx);\n    return ret;\n}\n/**\n* @param {string} arg0\n* @returns {any}\n*/\nfunction compile(arg0) {\n    const ptr0 = passStringToWasm(arg0);\n    const len0 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"compile\"](ptr0, len0));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr0, len0 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use selector\n*\n* @param {any} arg0\n* @returns {any}\n*/\nfunction reader(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"reader\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @returns {any}\n*/\nfunction selector(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"selector\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction select(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"select\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use select\n*\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction read(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"read\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n* @returns {void}\n*/\nfunction testa() {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"testa\"]();\n}\n\nfunction __widl_f_log_1_(arg0) {\n    console.log(getObject(arg0));\n}\n\nlet cachedTextDecoder = new TextDecoder('utf-8');\n\nfunction getStringFromWasm(ptr, len) {\n    return cachedTextDecoder.decode(getUint8Memory().subarray(ptr, ptr + len));\n}\n\nfunction __wbindgen_string_new(p, l) { return addHeapObject(getStringFromWasm(p, l)); }\n\nfunction __wbindgen_number_get(n, invalid) {\n    let obj = getObject(n);\n    if (typeof(obj) === 'number') return obj;\n    getUint8Memory()[invalid] = 1;\n    return 0;\n}\n\nfunction __wbindgen_is_string(i) { return typeof(getObject(i)) === 'string' ? 1 : 0; }\n\nlet cachegetUint32Memory = null;\nfunction getUint32Memory() {\n    if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint32Memory = new Uint32Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint32Memory;\n}\n\nfunction __wbindgen_string_get(i, len_ptr) {\n    let obj = getObject(i);\n    if (typeof(obj) !== 'string') return 0;\n    const ptr = passStringToWasm(obj);\n    getUint32Memory()[len_ptr / 4] = WASM_VECTOR_LEN;\n    return ptr;\n}\n\nconst __wbindgen_cb_forget = dropObject;\n\nfunction __wbindgen_json_parse(ptr, len) { return addHeapObject(JSON.parse(getStringFromWasm(ptr, len))); }\n\nfunction __wbindgen_json_serialize(idx, ptrptr) {\n    const ptr = passStringToWasm(JSON.stringify(getObject(idx)));\n    getUint32Memory()[ptrptr / 4] = ptr;\n    return WASM_VECTOR_LEN;\n}\n\nfunction __wbindgen_closure_wrapper101(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(16);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(17);\n    const cb = function(arg0) {\n        this.cnt++;\n        try {\n            return takeObject(f(this.a, b, addHeapObject(arg0)));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_closure_wrapper103(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(14);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(15);\n    const cb = function(arg0) {\n        this.cnt++;\n        const ptr0 = passStringToWasm(arg0);\n        const len0 = WASM_VECTOR_LEN;\n        try {\n            return takeObject(f(this.a, b, ptr0, len0));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_object_clone_ref(idx) {\n    return addHeapObject(getObject(idx));\n}\n\nfunction __wbindgen_object_drop_ref(i) { dropObject(i); }\n\nfunction __wbindgen_throw(ptr, len) {\n    throw new Error(getStringFromWasm(ptr, len));\n}\n\n\n\n//# sourceURL=webpack:///../browser_pkg/jsonpath_wasm.js?");
+eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"alloc_json\", function() { return alloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"dealloc_json\", function() { return dealloc_json; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"compile\", function() { return compile; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"reader\", function() { return reader; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"selector\", function() { return selector; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"select\", function() { return select; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"read\", function() { return read; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"testa\", function() { return testa; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__widl_f_log_1_\", function() { return __widl_f_log_1_; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_clone_ref\", function() { return __wbindgen_object_clone_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_object_drop_ref\", function() { return __wbindgen_object_drop_ref; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_new\", function() { return __wbindgen_string_new; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_number_get\", function() { return __wbindgen_number_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_is_string\", function() { return __wbindgen_is_string; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_string_get\", function() { return __wbindgen_string_get; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_cb_forget\", function() { return __wbindgen_cb_forget; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_parse\", function() { return __wbindgen_json_parse; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_json_serialize\", function() { return __wbindgen_json_serialize; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper99\", function() { return __wbindgen_closure_wrapper99; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_closure_wrapper101\", function() { return __wbindgen_closure_wrapper101; });\n/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, \"__wbindgen_throw\", function() { return __wbindgen_throw; });\n/* harmony import */ var _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./jsonpath_wasm_bg */ \"../browser_pkg/jsonpath_wasm_bg.wasm\");\n/* tslint:disable */\n\n\nconst heap = new Array(32);\n\nheap.fill(undefined);\n\nheap.push(undefined, null, true, false);\n\nlet heap_next = heap.length;\n\nfunction addHeapObject(obj) {\n    if (heap_next === heap.length) heap.push(heap.length + 1);\n    const idx = heap_next;\n    heap_next = heap[idx];\n\n    heap[idx] = obj;\n    return idx;\n}\n/**\n* @param {any} arg0\n* @returns {number}\n*/\nfunction alloc_json(arg0) {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"alloc_json\"](addHeapObject(arg0));\n}\n\n/**\n* @param {number} arg0\n* @returns {boolean}\n*/\nfunction dealloc_json(arg0) {\n    return (_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"dealloc_json\"](arg0)) !== 0;\n}\n\nlet cachedTextEncoder = new TextEncoder('utf-8');\n\nlet cachegetUint8Memory = null;\nfunction getUint8Memory() {\n    if (cachegetUint8Memory === null || cachegetUint8Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint8Memory = new Uint8Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint8Memory;\n}\n\nlet WASM_VECTOR_LEN = 0;\n\nfunction passStringToWasm(arg) {\n\n    const buf = cachedTextEncoder.encode(arg);\n    const ptr = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_malloc\"](buf.length);\n    getUint8Memory().set(buf, ptr);\n    WASM_VECTOR_LEN = buf.length;\n    return ptr;\n}\n\nfunction getObject(idx) { return heap[idx]; }\n\nfunction dropObject(idx) {\n    if (idx < 36) return;\n    heap[idx] = heap_next;\n    heap_next = idx;\n}\n\nfunction takeObject(idx) {\n    const ret = getObject(idx);\n    dropObject(idx);\n    return ret;\n}\n/**\n* @param {string} arg0\n* @returns {any}\n*/\nfunction compile(arg0) {\n    const ptr0 = passStringToWasm(arg0);\n    const len0 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"compile\"](ptr0, len0));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr0, len0 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use selector\n*\n* @param {any} arg0\n* @returns {any}\n*/\nfunction reader(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"reader\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @returns {any}\n*/\nfunction selector(arg0) {\n    return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"selector\"](addHeapObject(arg0)));\n}\n\n/**\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction select(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"select\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n*\n* deprecated. use select\n*\n* @param {any} arg0\n* @param {string} arg1\n* @returns {any}\n*/\nfunction read(arg0, arg1) {\n    const ptr1 = passStringToWasm(arg1);\n    const len1 = WASM_VECTOR_LEN;\n    try {\n        return takeObject(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"read\"](addHeapObject(arg0), ptr1, len1));\n\n    } finally {\n        _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbindgen_free\"](ptr1, len1 * 1);\n\n    }\n\n}\n\n/**\n* @returns {void}\n*/\nfunction testa() {\n    return _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"testa\"]();\n}\n\nfunction __widl_f_log_1_(arg0) {\n    console.log(getObject(arg0));\n}\n\nfunction __wbindgen_object_clone_ref(idx) {\n    return addHeapObject(getObject(idx));\n}\n\nfunction __wbindgen_object_drop_ref(i) { dropObject(i); }\n\nlet cachedTextDecoder = new TextDecoder('utf-8');\n\nfunction getStringFromWasm(ptr, len) {\n    return cachedTextDecoder.decode(getUint8Memory().subarray(ptr, ptr + len));\n}\n\nfunction __wbindgen_string_new(p, l) {\n    return addHeapObject(getStringFromWasm(p, l));\n}\n\nfunction __wbindgen_number_get(n, invalid) {\n    let obj = getObject(n);\n    if (typeof(obj) === 'number') return obj;\n    getUint8Memory()[invalid] = 1;\n    return 0;\n}\n\nfunction __wbindgen_is_string(i) {\n    return typeof(getObject(i)) === 'string' ? 1 : 0;\n}\n\nlet cachegetUint32Memory = null;\nfunction getUint32Memory() {\n    if (cachegetUint32Memory === null || cachegetUint32Memory.buffer !== _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer) {\n        cachegetUint32Memory = new Uint32Array(_jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"memory\"].buffer);\n    }\n    return cachegetUint32Memory;\n}\n\nfunction __wbindgen_string_get(i, len_ptr) {\n    let obj = getObject(i);\n    if (typeof(obj) !== 'string') return 0;\n    const ptr = passStringToWasm(obj);\n    getUint32Memory()[len_ptr / 4] = WASM_VECTOR_LEN;\n    return ptr;\n}\n\nconst __wbindgen_cb_forget = dropObject;\n\nfunction __wbindgen_json_parse(ptr, len) {\n    return addHeapObject(JSON.parse(getStringFromWasm(ptr, len)));\n}\n\nfunction __wbindgen_json_serialize(idx, ptrptr) {\n    const ptr = passStringToWasm(JSON.stringify(getObject(idx)));\n    getUint32Memory()[ptrptr / 4] = ptr;\n    return WASM_VECTOR_LEN;\n}\n\nfunction __wbindgen_closure_wrapper99(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(14);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(15);\n    const cb = function(arg0) {\n        this.cnt++;\n        try {\n            return takeObject(f(this.a, b, addHeapObject(arg0)));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_closure_wrapper101(a, b, _ignored) {\n    const f = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(16);\n    const d = _jsonpath_wasm_bg__WEBPACK_IMPORTED_MODULE_0__[\"__wbg_function_table\"].get(17);\n    const cb = function(arg0) {\n        this.cnt++;\n        const ptr0 = passStringToWasm(arg0);\n        const len0 = WASM_VECTOR_LEN;\n        try {\n            return takeObject(f(this.a, b, ptr0, len0));\n\n        } finally {\n            if (this.cnt-- == 1) d(this.a, b);\n\n        }\n\n    };\n    cb.a = a;\n    cb.cnt = 1;\n    let real = cb.bind(cb);\n    real.original = cb;\n    return addHeapObject(real);\n}\n\nfunction __wbindgen_throw(ptr, len) {\n    throw new Error(getStringFromWasm(ptr, len));\n}\n\n\n\n//# sourceURL=webpack:///../browser_pkg/jsonpath_wasm.js?");
 
 /***/ }),
 
@@ -16,7 +16,7 @@ eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export (binding) *
 /*!********************************************!*\
   !*** ../browser_pkg/jsonpath_wasm_bg.wasm ***!
   \********************************************/
-/*! exports provided: memory, alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __wbindgen_malloc, __wbindgen_realloc, __wbindgen_free, __wbg_function_table */
+/*! exports provided: memory, alloc_json, dealloc_json, compile, reader, selector, select, read, testa, __wbindgen_malloc, __wbindgen_free, __wbg_function_table */
 /***/ (function(module, exports, __webpack_require__) {
 
 eval("\"use strict\";\n// Instantiate WebAssembly module\nvar wasmExports = __webpack_require__.w[module.i];\n__webpack_require__.r(exports);\n// export exports from WebAssembly module\nfor(var name in wasmExports) if(name != \"__webpack_init__\") exports[name] = wasmExports[name];\n// exec imports from WebAssembly module (for esm order)\n/* harmony import */ var m0 = __webpack_require__(/*! ./jsonpath_wasm */ \"../browser_pkg/jsonpath_wasm.js\");\n\n\n// exec wasm module\nwasmExports[\"__webpack_init__\"]()\n\n//# sourceURL=webpack:///../browser_pkg/jsonpath_wasm_bg.wasm?");
@@ -31,7 +31,7 @@ eval("\"use strict\";\n// Instantiate WebAssembly module\nvar wasmExports = __we
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
-eval("__webpack_require__.r(__webpack_exports__);\n/* harmony import */ var _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! @browser/jsonpath-wasm */ \"../browser_pkg/jsonpath_wasm.js\");\n/* harmony import */ var jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! jsonpath/jsonpath.js */ \"./node_modules/jsonpath/jsonpath.js\");\n/* harmony import */ var jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1__);\n\n\n\nfunction run(message, iter, cb) {\n    return new Promise(function(resolve, _reject) {\n        let d = Date.now();\n        for (let i = 0; i < iter; i++) {\n            cb();\n        }\n        msg([message, Date.now() - d].join(\", \"));\n        setTimeout(resolve, 0);\n    })\n}\n\nfunction msg(msg) {\n    console.log(msg);\n    let div = document.createElement(\"div\");\n    div.innerText = msg;\n    document.body.appendChild(div);\n}\n\nlet json = {\n    \"store\": {\n        \"book\": [\n            {\n                \"category\": \"reference\",\n                \"author\": \"Nigel Rees\",\n                \"title\": \"Sayings of the Century\",\n                \"price\": 8.95\n            },\n            {\n                \"category\": \"fiction\",\n                \"author\": \"Evelyn Waugh\",\n                \"title\": \"Sword of Honour\",\n                \"price\": 12.99\n            },\n            {\n                \"category\": \"fiction\",\n                \"author\": \"Herman Melville\",\n                \"title\": \"Moby Dick\",\n                \"isbn\": \"0-553-21311-3\",\n                \"price\": 8.99\n            },\n            {\n                \"category\": \"fiction\",\n                \"author\": \"J. R. R. Tolkien\",\n                \"title\": \"The Lord of the Rings\",\n                \"isbn\": \"0-395-19395-8\",\n                \"price\": 22.99\n            }\n        ],\n        \"bicycle\": {\n            \"color\": \"red\",\n            \"price\": 19.95\n        }\n    },\n    \"expensive\": 10\n};\n\nlet path = '$..book[?(@.price<30 && @.category==\"fiction\")]';\nlet template = _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"compile\"](path);\nlet selector = _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"selector\"](json);\n\nlet ptr = _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"alloc_json\"](json);\nif(ptr == 0) console.error('invalid ptr');\n\nlet iterCount = 3000;\n\nrun('jsonpath', iterCount, function() { jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1__[\"query\"](json, path) })\n     .then(function() {\n         return run('jsonpath-wasm- selector', iterCount, function() { selector(path) });\n     })\n    .then(function() {\n        return run('jsonpath-wasm- compile', iterCount, function() { template(json) });\n    })\n    .then(function() {\n        return run('jsonpath-wasm- compile-alloc', iterCount, function() { template(ptr) });\n    })\n    .then(function() {\n        return run('jsonpath-wasm- select', iterCount, function() { _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"select\"](json, path) });\n    })\n    .then(function() {\n        return run('jsonpath-wasm- select-alloc', iterCount, function() { _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"select\"](ptr, path) });\n    })\n    .finally(function() {\n        if(!_browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"dealloc_json\"](ptr)) {\n            console.error('fail to dealloc');\n        }\n    });\n\n\n//# sourceURL=webpack:///./index.js?");
+eval("__webpack_require__.r(__webpack_exports__);\n/* harmony import */ var _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! @browser/jsonpath-wasm */ \"../browser_pkg/jsonpath_wasm.js\");\n/* harmony import */ var jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! jsonpath/jsonpath.js */ \"./node_modules/jsonpath/jsonpath.js\");\n/* harmony import */ var jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1__);\n\n\n\nfunction run(message, iter, cb) {\n    return new Promise(function(resolve, _reject) {\n        let d = Date.now();\n        for (let i = 0; i < iter; i++) {\n            cb();\n        }\n        msg([message, Date.now() - d].join(\", \"));\n        setTimeout(resolve, 0);\n    })\n}\n\nfunction msg(msg) {\n    console.log(msg);\n    let div = document.createElement(\"div\");\n    div.innerText = msg;\n    document.body.appendChild(div);\n}\n\nlet json = {\n    \"store\": {\n        \"book\": [\n            {\n                \"category\": \"reference\",\n                \"author\": \"Nigel Rees\",\n                \"title\": \"Sayings of the Century\",\n                \"price\": 8.95\n            },\n            {\n                \"category\": \"fiction\",\n                \"author\": \"Evelyn Waugh\",\n                \"title\": \"Sword of Honour\",\n                \"price\": 12.99\n            },\n            {\n                \"category\": \"fiction\",\n                \"author\": \"Herman Melville\",\n                \"title\": \"Moby Dick\",\n                \"isbn\": \"0-553-21311-3\",\n                \"price\": 8.99\n            },\n            {\n                \"category\": \"fiction\",\n                \"author\": \"J. R. R. Tolkien\",\n                \"title\": \"The Lord of the Rings\",\n                \"isbn\": \"0-395-19395-8\",\n                \"price\": 22.99\n            }\n        ],\n        \"bicycle\": {\n            \"color\": \"red\",\n            \"price\": 19.95\n        }\n    },\n    \"expensive\": 10\n};\n\nlet path = '$..book[?(@.price<30 && @.category==\"fiction\")]';\nlet template = _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"compile\"](path);\nlet selector = _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"selector\"](json);\n\nlet ptr = _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"alloc_json\"](json);\nif(ptr == 0) console.error('invalid ptr');\n\nlet iterCount = 2000;\n\nrun('jsonpath', iterCount, function() { jsonpath_jsonpath_js__WEBPACK_IMPORTED_MODULE_1__[\"query\"](json, path) })\n     .then(function() {\n         return run('jsonpath-wasm- selector', iterCount, function() { selector(path) });\n     })\n    .then(function() {\n        return run('jsonpath-wasm- compile', iterCount, function() { template(json) });\n    })\n    .then(function() {\n        return run('jsonpath-wasm- compile-alloc', iterCount, function() { template(ptr) });\n    })\n    .then(function() {\n        return run('jsonpath-wasm- select', iterCount, function() { _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"select\"](json, path) });\n    })\n    .then(function() {\n        return run('jsonpath-wasm- select-alloc', iterCount, function() { _browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"select\"](ptr, path) });\n    })\n    .finally(function() {\n        if(!_browser_jsonpath_wasm__WEBPACK_IMPORTED_MODULE_0__[\"dealloc_json\"](ptr)) {\n            console.error('fail to dealloc');\n        }\n    });\n\n\n//# sourceURL=webpack:///./index.js?");
 
 /***/ })
 
diff --git a/docs/bench/9a826648f4cbc2bc8591.module.wasm b/docs/bench/9a826648f4cbc2bc8591.module.wasm
deleted file mode 100644
index b09af39..0000000
Binary files a/docs/bench/9a826648f4cbc2bc8591.module.wasm and /dev/null differ
diff --git a/docs/bench/bootstrap.js b/docs/bench/bootstrap.js
index cd45796..7b72122 100644
--- a/docs/bench/bootstrap.js
+++ b/docs/bench/bootstrap.js
@@ -61,9 +61,6 @@
 /******/ 					"__wbindgen_object_drop_ref": function(p0i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_object_drop_ref"](p0i32);
 /******/ 					},
-/******/ 					"__wbindgen_object_clone_ref": function(p0i32) {
-/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_object_clone_ref"](p0i32);
-/******/ 					},
 /******/ 					"__wbindgen_cb_forget": function(p0i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_cb_forget"](p0i32);
 /******/ 					},
@@ -85,14 +82,17 @@
 /******/ 					"__wbindgen_string_get": function(p0i32,p1i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_string_get"](p0i32,p1i32);
 /******/ 					},
+/******/ 					"__wbindgen_object_clone_ref": function(p0i32) {
+/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_object_clone_ref"](p0i32);
+/******/ 					},
 /******/ 					"__wbindgen_throw": function(p0i32,p1i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_throw"](p0i32,p1i32);
 /******/ 					},
+/******/ 					"__wbindgen_closure_wrapper99": function(p0i32,p1i32,p2i32) {
+/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_closure_wrapper99"](p0i32,p1i32,p2i32);
+/******/ 					},
 /******/ 					"__wbindgen_closure_wrapper101": function(p0i32,p1i32,p2i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_closure_wrapper101"](p0i32,p1i32,p2i32);
-/******/ 					},
-/******/ 					"__wbindgen_closure_wrapper103": function(p0i32,p1i32,p2i32) {
-/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_closure_wrapper103"](p0i32,p1i32,p2i32);
 /******/ 					}
 /******/ 				}
 /******/ 			};
@@ -192,7 +192,7 @@
 /******/ 				promises.push(installedWasmModuleData);
 /******/ 			else {
 /******/ 				var importObject = wasmImportObjects[wasmModuleId]();
-/******/ 				var req = fetch(__webpack_require__.p + "" + {"../browser_pkg/jsonpath_wasm_bg.wasm":"9a826648f4cbc2bc8591"}[wasmModuleId] + ".module.wasm");
+/******/ 				var req = fetch(__webpack_require__.p + "" + {"../browser_pkg/jsonpath_wasm_bg.wasm":"db8564aae9d99ec41b79"}[wasmModuleId] + ".module.wasm");
 /******/ 				var promise;
 /******/ 				if(importObject instanceof Promise && typeof WebAssembly.compileStreaming === 'function') {
 /******/ 					promise = Promise.all([WebAssembly.compileStreaming(req), importObject]).then(function(items) {
diff --git a/docs/bench/db8564aae9d99ec41b79.module.wasm b/docs/bench/db8564aae9d99ec41b79.module.wasm
new file mode 100644
index 0000000..d66938d
Binary files /dev/null and b/docs/bench/db8564aae9d99ec41b79.module.wasm differ
diff --git a/docs/bootstrap.js b/docs/bootstrap.js
index 1c451f3..2200220 100644
--- a/docs/bootstrap.js
+++ b/docs/bootstrap.js
@@ -61,9 +61,6 @@
 /******/ 					"__wbindgen_object_drop_ref": function(p0i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_object_drop_ref"](p0i32);
 /******/ 					},
-/******/ 					"__wbindgen_object_clone_ref": function(p0i32) {
-/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_object_clone_ref"](p0i32);
-/******/ 					},
 /******/ 					"__wbindgen_cb_forget": function(p0i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_cb_forget"](p0i32);
 /******/ 					},
@@ -85,14 +82,17 @@
 /******/ 					"__wbindgen_string_get": function(p0i32,p1i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_string_get"](p0i32,p1i32);
 /******/ 					},
+/******/ 					"__wbindgen_object_clone_ref": function(p0i32) {
+/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_object_clone_ref"](p0i32);
+/******/ 					},
 /******/ 					"__wbindgen_throw": function(p0i32,p1i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_throw"](p0i32,p1i32);
 /******/ 					},
+/******/ 					"__wbindgen_closure_wrapper99": function(p0i32,p1i32,p2i32) {
+/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_closure_wrapper99"](p0i32,p1i32,p2i32);
+/******/ 					},
 /******/ 					"__wbindgen_closure_wrapper101": function(p0i32,p1i32,p2i32) {
 /******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_closure_wrapper101"](p0i32,p1i32,p2i32);
-/******/ 					},
-/******/ 					"__wbindgen_closure_wrapper103": function(p0i32,p1i32,p2i32) {
-/******/ 						return installedModules["../browser_pkg/jsonpath_wasm.js"].exports["__wbindgen_closure_wrapper103"](p0i32,p1i32,p2i32);
 /******/ 					}
 /******/ 				}
 /******/ 			};
@@ -192,7 +192,7 @@
 /******/ 				promises.push(installedWasmModuleData);
 /******/ 			else {
 /******/ 				var importObject = wasmImportObjects[wasmModuleId]();
-/******/ 				var req = fetch(__webpack_require__.p + "" + {"../browser_pkg/jsonpath_wasm_bg.wasm":"9a826648f4cbc2bc8591"}[wasmModuleId] + ".module.wasm");
+/******/ 				var req = fetch(__webpack_require__.p + "" + {"../browser_pkg/jsonpath_wasm_bg.wasm":"db8564aae9d99ec41b79"}[wasmModuleId] + ".module.wasm");
 /******/ 				var promise;
 /******/ 				if(importObject instanceof Promise && typeof WebAssembly.compileStreaming === 'function') {
 /******/ 					promise = Promise.all([WebAssembly.compileStreaming(req), importObject]).then(function(items) {
diff --git a/docs/db8564aae9d99ec41b79.module.wasm b/docs/db8564aae9d99ec41b79.module.wasm
new file mode 100644
index 0000000..d66938d
Binary files /dev/null and b/docs/db8564aae9d99ec41b79.module.wasm differ
diff --git a/nodejs/.gitignore b/nodejs/.gitignore
new file mode 100644
index 0000000..478f05e
--- /dev/null
+++ b/nodejs/.gitignore
@@ -0,0 +1,6 @@
+native/target
+native/index.node
+native/artifacts.json
+**/*~
+**/node_modules
+.idea
\ No newline at end of file
diff --git a/nodejs/README.md b/nodejs/README.md
new file mode 100644
index 0000000..02d46bd
--- /dev/null
+++ b/nodejs/README.md
@@ -0,0 +1,3 @@
+# jsonpath-rs
+
+JsonPath engine for NodeJs with Rust native implementation.
diff --git a/nodejs/lib/index.js b/nodejs/lib/index.js
new file mode 100644
index 0000000..4dc380a
--- /dev/null
+++ b/nodejs/lib/index.js
@@ -0,0 +1,34 @@
+const { Compile, Selector, selectStr } = require('../native');
+
+function compile(path) {
+    let compile = new Compile(path);
+    return (json) => {
+        if(typeof json != 'string') {
+            json = JSON.stringify(json)
+        }
+        return compile.template(json);
+    };
+}
+
+function selector(json) {
+    if(typeof json != 'string') {
+        json = JSON.stringify(json)
+    }
+    let selector = new Selector(json);
+    return (path) => {
+        return selector.selector(path);
+    }
+}
+
+function select(json, path) {
+    if(typeof json != 'string') {
+        json = JSON.stringify(json)
+    }
+    return selectStr(json, path);
+}
+
+module.exports = {
+    compile,
+    selector,
+    select
+};
\ No newline at end of file
diff --git a/nodejs/native/.gitignore b/nodejs/native/.gitignore
new file mode 100644
index 0000000..8647db2
--- /dev/null
+++ b/nodejs/native/.gitignore
@@ -0,0 +1,5 @@
+.idea/*
+.vscode
+!.idea/runConfigurations/
+/target/
+Cargo.lock
\ No newline at end of file
diff --git a/nodejs/native/Cargo.toml b/nodejs/native/Cargo.toml
new file mode 100644
index 0000000..0cf1cc6
--- /dev/null
+++ b/nodejs/native/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "jsonpath-rs"
+version = "0.1.0"
+authors = ["Changseok Han <freestrings@gmail.com>"]
+description = "JsonPath engine for NodeJs with Rust native implementation."
+keywords = ["library", "jsonpath", "json"]
+repository = "https://github.com/freestrings/jsonpath"
+license = "MIT"
+
+build = "build.rs"
+exclude = ["artifacts.json", "index.node"]
+
+[build-dependencies]
+neon-build = "0.2.0"
+
+[dependencies]
+jsonpath_lib = { path = "../../" }
+neon = "0.2.0"
+neon-serde = "0.1.1"
+serde_json = { version = "1.0", features = ["preserve_order"] }
+
+[lib]
+name = "jsonpath_rs"
+crate-type = ["dylib"]
\ No newline at end of file
diff --git a/nodejs/native/build.rs b/nodejs/native/build.rs
new file mode 100644
index 0000000..687a661
--- /dev/null
+++ b/nodejs/native/build.rs
@@ -0,0 +1,7 @@
+extern crate neon_build;
+
+fn main() {
+    neon_build::setup(); // must be called in build.rs
+
+    // add project-specific build logic here...
+}
diff --git a/nodejs/native/src/lib.rs b/nodejs/native/src/lib.rs
new file mode 100644
index 0000000..cefd707
--- /dev/null
+++ b/nodejs/native/src/lib.rs
@@ -0,0 +1,126 @@
+extern crate jsonpath_lib as jsonpath;
+#[macro_use]
+extern crate neon;
+extern crate neon_serde;
+extern crate serde_json;
+
+use jsonpath::prelude::*;
+use neon::prelude::*;
+use serde_json::Value;
+
+///
+/// `neon_serde::from_value` has very poor performance.
+///
+fn select(mut ctx: FunctionContext) -> JsResult<JsValue> {
+    let json_val = ctx.argument::<JsValue>(0)?;
+    let json: Value = neon_serde::from_value(&mut ctx, json_val)?;
+    let path = ctx.argument::<JsString>(1)?.value();
+
+    match jsonpath::select(&json, path.as_str()) {
+        Ok(value) => Ok(neon_serde::to_value(&mut ctx, &value)?),
+        Err(e) => panic!("{:?}", e)
+    }
+}
+
+fn select_str(mut ctx: FunctionContext) -> JsResult<JsValue> {
+    let json_val = ctx.argument::<JsString>(0)?.value();
+    let json: Value = match serde_json::from_str(json_val.as_str()) {
+        Ok(json) => json,
+        Err(e) => panic!("{:?}", e)
+    };
+    let path = ctx.argument::<JsString>(1)?.value();
+    match jsonpath::select(&json, path.as_str()) {
+        Ok(value) => Ok(neon_serde::to_value(&mut ctx, &value)?),
+        Err(e) => panic!("{:?}", e)
+    }
+}
+
+pub struct Compile {
+    node: Node
+}
+
+pub struct Selector {
+    json: RefValueWrapper
+}
+
+declare_types! {
+    pub class JsCompile for Compile {
+        init(mut ctx) {
+            let path = ctx.argument::<JsString>(0)?.value();
+            let mut parser = Parser::new(path.as_str());
+
+            let node = match parser.compile() {
+                Ok(node) => node,
+                Err(e) => panic!("{:?}", e)
+            };
+
+            Ok(Compile { node })
+        }
+
+        method template(mut ctx) {
+            let this = ctx.this();
+
+            let node = {
+                let guard = ctx.lock();
+                let this = this.borrow(&guard);
+                this.node.clone()
+            };
+
+//            let o = ctx.argument::<JsValue>(0)?;
+//            let json: Value = neon_serde::from_value(&mut ctx, o)?;
+            let json_str = ctx.argument::<JsString>(0)?.value();
+            let json: Value = match serde_json::from_str(&json_str) {
+                Ok(json) => json,
+                Err(e) => panic!("{:?}", e)
+            };
+            let mut jf = JsonValueFilter::new_from_value((&json).into());
+            jf.visit(node);
+            let v = jf.take_value().into_value();
+            Ok(neon_serde::to_value(&mut ctx, &v)?)
+        }
+    }
+
+    pub class JsSelector for Selector {
+        init(mut ctx) {
+//            let o = ctx.argument::<JsValue>(0)?;
+//            let json: Value = neon_serde::from_value(&mut ctx, o)?;
+            let json_str = ctx.argument::<JsString>(0)?.value();
+            let json: Value = match serde_json::from_str(&json_str) {
+                Ok(json) => json,
+                Err(e) => panic!("{:?}", e)
+            };
+
+            Ok(Selector { json: (&json).into() })
+        }
+
+        method selector(mut ctx) {
+            let this = ctx.this();
+
+            let json = {
+                let guard = ctx.lock();
+                let this = this.borrow(&guard);
+                this.json.clone()
+            };
+
+            let path = ctx.argument::<JsString>(0)?.value();
+            let mut parser = Parser::new(path.as_str());
+
+            let node = match parser.compile() {
+                Ok(node) => node,
+                Err(e) => panic!("{:?}", e)
+            };
+
+            let mut jf = JsonValueFilter::new_from_value(json);
+            jf.visit(node);
+            let v = jf.take_value().into_value();
+            Ok(neon_serde::to_value(&mut ctx, &v)?)
+        }
+    }
+}
+register_module!(mut m, {
+    m.export_class::<JsCompile>("Compile").expect("Compile class error");
+    m.export_class::<JsSelector>("Selector").expect("Selector class error");
+    m.export_function("select", select)?;
+    m.export_function("selectStr", select_str)?;
+    Ok(())
+});
\ No newline at end of file
diff --git a/nodejs/package-lock.json b/nodejs/package-lock.json
new file mode 100644
index 0000000..e8a63d1
--- /dev/null
+++ b/nodejs/package-lock.json
@@ -0,0 +1,3172 @@
+{
+  "name": "jsonpath-rs",
+  "version": "0.1.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
+    },
+    "ajv": {
+      "version": "4.11.8",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-4.11.8.tgz",
+      "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
+      "requires": {
+        "co": "^4.6.0",
+        "json-stable-stringify": "^1.0.1"
+      }
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+      }
+    },
+    "yargs-unparser": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.5.0.tgz",
+      "integrity": "sha512-HK25qidFTCVuj/D1VfNiEndpLIeJN78aqgR23nL3y4N0U/91cOAzqfHlF8n2BvoNDcZmJKin3ddNSvOxSr8flw==",
+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.11",
+        "yargs": "^12.0.5"
+      }
+    }
+  }
+}
diff --git a/nodejs/package.json b/nodejs/package.json
new file mode 100644
index 0000000..9b7c317
--- /dev/null
+++ b/nodejs/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "jsonpath-rs",
+  "version": "0.1.0",
+  "description": "JsonPath engine for NodeJs with Rust native implementation.",
+  "author": "Changseok Han <freestrings@gmail.com>",
+  "repository": "git+https://github.com/freestrings/jsonpath",
+  "license": "MIT",
+  "main": "lib/index.js",
+  "dependencies": {
+    "neon-cli": "^0.2.0",
+    "node-pre-gyp": "0.6"
+  },
+  "scripts": {
+    "install": "neon build --release",
+    "test": "mocha"
+  },
+  "devDependencies": {
+    "mocha": "^6.0.2"
+  }
+}
diff --git a/nodejs/test/index.spec.js b/nodejs/test/index.spec.js
new file mode 100644
index 0000000..751d3d0
--- /dev/null
+++ b/nodejs/test/index.spec.js
@@ -0,0 +1,30 @@
+const jsonpath = require('../lib/index.js');
+
+describe('compile test', () => {
+    it('basic', (done) => {
+        let template = jsonpath.compile('$.a');
+        let result = template({'a': 1});
+        if (result == 1) {
+            done();
+        }
+    });
+});
+
+describe('selector test', () => {
+    it('basic', (done) => {
+        let selector = jsonpath.selector({'a': 1});
+        let result = selector('$.a');
+        if (result == 1) {
+            done();
+        }
+    });
+});
+
+describe('select test', () => {
+    it('basic', (done) => {
+        let result = jsonpath.select({'a': 1}, '$.a');
+        if (result == 1) {
+            done();
+        }
+    });
+});
\ No newline at end of file
diff --git a/src/filter/mod.rs b/src/filter/mod.rs
index fe47e4f..dc1a333 100644
--- a/src/filter/mod.rs
+++ b/src/filter/mod.rs
@@ -1,353 +1,5 @@
-use super::parser::*;
-
 mod cmp;
 mod term;
-pub mod value_filter;
+mod value_filter;
 mod value_wrapper;
-
-#[cfg(test)]
-mod tests {
-    extern crate env_logger;
-
-    use std::io::Read;
-
-    use serde_json::Value;
-
-    use super::parser::Parser;
-    use super::value_filter::*;
-
-    fn setup() {
-        let _ = env_logger::try_init();
-    }
-
-    fn new_value_filter(file: &str) -> ValueFilter {
-        let string = read_json(file);
-        let json: Value = serde_json::from_str(string.as_str()).unwrap();
-        ValueFilter::new(json.into(), false, false)
-    }
-
-    fn do_filter(path: &str, file: &str) -> JsonValueFilter {
-        let string = read_json(file);
-        let mut jf = JsonValueFilter::new(string.as_str()).unwrap();
-        let mut parser = Parser::new(path);
-        parser.parse(&mut jf).unwrap();
-        jf
-    }
-
-    fn read_json(path: &str) -> String {
-        let mut f = std::fs::File::open(path).unwrap();
-        let mut contents = String::new();
-        f.read_to_string(&mut contents).unwrap();
-        contents
-    }
-
-    #[test]
-    fn step_in() {
-        setup();
-
-        let mut jf = new_value_filter("./benches/data_obj.json");
-        {
-            let current = jf.step_in_str("friends");
-            assert_eq!(current.is_array(), true);
-        }
-
-        let mut jf = new_value_filter("./benches/data_array.json");
-        {
-            let current = jf.step_in_num(&1.0);
-            assert_eq!(current.get_val().is_object(), true);
-        }
-        {
-            let current = jf.step_in_str("friends");
-            assert_eq!(current.is_array(), true);
-        }
-        let mut jf = new_value_filter("./benches/data_obj.json");
-        {
-            jf.step_in_str("school");
-            jf.step_in_str("friends");
-            jf.step_in_all();
-            let current = jf.step_in_str("name");
-            let friends = json!([
-                "Millicent Norman",
-                "Vincent Cannon",
-                "Gray Berry"
-            ]);
-            assert_eq!(friends, current.get_val().into_value());
-        }
-        let mut jf = new_value_filter("./benches/data_obj.json");
-        {
-            let current = jf.step_leaves_str("name");
-            let names = json!([
-                "Leonor Herman",
-                "Millicent Norman",
-                "Vincent Cannon",
-                "Gray Berry",
-                "Vincent Cannon",
-                "Gray Berry"
-            ]);
-            assert_eq!(names, current.get_val().into_value());
-        }
-    }
-
-    #[test]
-    fn array() {
-        setup();
-
-        let friends = json!([
-            {"id": 1, "name": "Vincent Cannon" },
-            {"id": 2, "name": "Gray Berry"}
-        ]);
-
-        let jf = do_filter("$.school.friends[1, 2]", "./benches/data_obj.json");
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.school.friends[1:]", "./benches/data_obj.json");
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.school.friends[:-2]", "./benches/data_obj.json");
-        let friends = json!([
-            {"id": 0, "name": "Millicent Norman"}
-        ]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$..friends[2].name", "./benches/data_obj.json");
-        let friends = json!(["Gray Berry", "Gray Berry"]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$..friends[*].name", "./benches/data_obj.json");
-        let friends = json!(["Vincent Cannon","Gray Berry","Millicent Norman","Vincent Cannon","Gray Berry"]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$['school']['friends'][*].['name']", "./benches/data_obj.json");
-        let friends = json!(["Millicent Norman","Vincent Cannon","Gray Berry"]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$['school']['friends'][0].['name']", "./benches/data_obj.json");
-        let friends = json!("Millicent Norman");
-        assert_eq!(friends, jf.current_value().into_value());
-    }
-
-    #[test]
-    fn return_type() {
-        setup();
-
-        let friends = json!({
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        });
-
-        let jf = do_filter("$.school", "./benches/data_obj.json");
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.school[?(@.friends[0])]", "./benches/data_obj.json");
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.school[?(@.friends[10])]", "./benches/data_obj.json");
-        assert_eq!(Value::Null, jf.current_value().into_value());
-
-        let jf = do_filter("$.school[?(1==1)]", "./benches/data_obj.json");
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.school.friends[?(1==1)]", "./benches/data_obj.json");
-        let friends = json!([
-            {"id": 0, "name": "Millicent Norman"},
-            {"id": 1, "name": "Vincent Cannon" },
-            {"id": 2, "name": "Gray Berry"}
-        ]);
-        assert_eq!(friends, jf.current_value().into_value());
-    }
-
-    #[test]
-    fn op() {
-        setup();
-
-        let jf = do_filter("$.school[?(@.friends == @.friends)]", "./benches/data_obj.json");
-        let friends = json!({
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        });
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.friends[?(@.name)]", "./benches/data_obj.json");
-        let friends = json!([
-            { "id" : 1, "name" : "Vincent Cannon" },
-            { "id" : 2, "name" : "Gray Berry" }
-        ]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.friends[?(@.id >= 2)]", "./benches/data_obj.json");
-        let friends = json!([
-            { "id" : 2, "name" : "Gray Berry" }
-        ]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.friends[?(@.id >= 2 || @.id == 1)]", "./benches/data_obj.json");
-        let friends = json!([
-            { "id" : 2, "name" : "Gray Berry" },
-            { "id" : 1, "name" : "Vincent Cannon" }
-        ]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$.friends[?( (@.id >= 2 || @.id == 1) && @.id == 0)]", "./benches/data_obj.json");
-        assert_eq!(Value::Null, jf.current_value().into_value());
-
-        let jf = do_filter("$..friends[?(@.id == $.index)].id", "./benches/data_obj.json");
-        let friends = json!([0, 0]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[?($.store.bicycle.price < @.price)].price", "./benches/example.json");
-        let friends = json!([22.99]);
-        assert_eq!(friends, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[?( (@.price == 12.99 || @.category == 'reference') && @.price > 10)].price", "./benches/example.json");
-        let friends = json!([12.99]);
-        assert_eq!(friends, jf.current_value().into_value());
-    }
-
-    #[test]
-    fn example() {
-        setup();
-
-        let jf = do_filter("$.store.book[*].author", "./benches/example.json");
-        let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..author", "./benches/example.json");
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$.store.*", "./benches/example.json");
-        let ret = json!([
-        [
-            {"category" : "reference", "author" : "Nigel Rees","title" : "Sayings of the Century", "price" : 8.95},
-            {"category" : "fiction", "author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99},
-            {"category" : "fiction", "author" : "Herman Melville","title" : "Moby Dick","isbn" : "0-553-21311-3","price" : 8.99},
-            {"category" : "fiction", "author" : "J. R. R. Tolkien","title" : "The Lord of the Rings","isbn" : "0-395-19395-8","price" : 22.99}
-        ],
-        {"color" : "red","price" : 19.95},
-        ]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$.store..price", "./benches/example.json");
-        let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[2]", "./benches/example.json");
-        let ret = json!([{
-            "category" : "fiction",
-            "author" : "Herman Melville",
-            "title" : "Moby Dick",
-            "isbn" : "0-553-21311-3",
-            "price" : 8.99
-        }]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[-2]", "./benches/example.json");
-        let ret = json!([{
-            "category" : "fiction",
-            "author" : "Herman Melville",
-            "title" : "Moby Dick",
-            "isbn" : "0-553-21311-3",
-            "price" : 8.99
-        }]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[0,1]", "./benches/example.json");
-        let ret = json!([
-            {
-                "category" : "reference",
-                "author" : "Nigel Rees",
-                "title" : "Sayings of the Century",
-                "price" : 8.95
-            },
-            {
-                "category" : "fiction",
-                "author" : "Evelyn Waugh",
-                "title" : "Sword of Honour",
-                "price" : 12.99
-            }
-        ]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[:2]", "./benches/example.json");
-        let ret = json!([
-           {
-              "category" : "reference",
-              "author" : "Nigel Rees",
-              "title" : "Sayings of the Century",
-              "price" : 8.95
-           },
-           {
-              "category" : "fiction",
-              "author" : "Evelyn Waugh",
-              "title" : "Sword of Honour",
-              "price" : 12.99
-           }
-        ]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[2:]", "./benches/example.json");
-        let ret = json!([
-           {
-              "category" : "fiction",
-              "author" : "Herman Melville",
-              "title" : "Moby Dick",
-              "isbn" : "0-553-21311-3",
-              "price" : 8.99
-           },
-           {
-              "category" : "fiction",
-              "author" : "J. R. R. Tolkien",
-              "title" : "The Lord of the Rings",
-              "isbn" : "0-395-19395-8",
-              "price" : 22.99
-           }
-        ]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..book[?(@.isbn)]", "./benches/example.json");
-        let ret = json!([
-           {
-              "category" : "fiction",
-              "author" : "Herman Melville",
-              "title" : "Moby Dick",
-              "isbn" : "0-553-21311-3",
-              "price" : 8.99
-           },
-           {
-              "category" : "fiction",
-              "author" : "J. R. R. Tolkien",
-              "title" : "The Lord of the Rings",
-              "isbn" : "0-395-19395-8",
-              "price" : 22.99
-           }
-        ]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$.store.book[?(@.price < 10)]", "./benches/example.json");
-        let ret = json!([
-           {
-              "category" : "reference",
-              "author" : "Nigel Rees",
-              "title" : "Sayings of the Century",
-              "price" : 8.95
-           },
-           {
-              "category" : "fiction",
-              "author" : "Herman Melville",
-              "title" : "Moby Dick",
-              "isbn" : "0-553-21311-3",
-              "price" : 8.99
-           }
-        ]);
-        assert_eq!(ret, jf.current_value().into_value());
-
-        let jf = do_filter("$..*", "./benches/example.json");
-        let json: Value = serde_json::from_str(read_json("./benches/giveme_every_thing_result.json").as_str()).unwrap();
-        assert_eq!(json, jf.current_value().into_value());
-    }
-}
\ No newline at end of file
+pub mod prelude;
\ No newline at end of file
diff --git a/src/filter/prelude.rs b/src/filter/prelude.rs
new file mode 100644
index 0000000..e79ac31
--- /dev/null
+++ b/src/filter/prelude.rs
@@ -0,0 +1 @@
+pub use super::value_filter::*;
\ No newline at end of file
diff --git a/src/filter/value_filter.rs b/src/filter/value_filter.rs
index 4a4c2d8..8b71639 100644
--- a/src/filter/value_filter.rs
+++ b/src/filter/value_filter.rs
@@ -1,13 +1,13 @@
 use std::error::Error;
-use std::result;
-
-use ref_value::*;
+use std::result::Result;
 
 use serde_json::Value;
 
-use super::parser::*;
-use super::term::*;
-use super::value_wrapper::*;
+use ref_value::*;
+
+use parser::prelude::*;
+use filter::term::*;
+use filter::value_wrapper::*;
 
 trait ArrayIndex {
     fn index(&self, v: &RefValueWrapper) -> usize;
@@ -277,10 +277,10 @@ pub struct JsonValueFilter {
 }
 
 impl JsonValueFilter {
-    pub fn new(json: &str) -> result::Result<Self, String> {
+    pub fn new(json: &str) -> Result<Self, String> {
         let json: Value = serde_json::from_str(json)
             .map_err(|e| e.description().to_string())?;
-        Ok(JsonValueFilter::new_from_value(json.into()))
+        Ok(JsonValueFilter::new_from_value((&json).into()))
     }
 
     pub fn new_from_value(json: RefValueWrapper) -> Self {
diff --git a/src/filter/value_wrapper.rs b/src/filter/value_wrapper.rs
index 10fb08d..355f279 100644
--- a/src/filter/value_wrapper.rs
+++ b/src/filter/value_wrapper.rs
@@ -1,4 +1,5 @@
 use indexmap::map::IndexMap;
+
 use ref_value::*;
 
 use super::cmp::*;
diff --git a/src/lib.rs b/src/lib.rs
index 5b33663..8de9510 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -43,7 +43,7 @@
 //!    "expensive": 10
 //!    });
 //!
-//!    let mut selector = jsonpath::selector(json_obj);
+//!    let mut selector = jsonpath::selector(&json_obj);
 //!
 //!    //
 //!    // $.store.book[*].author
@@ -158,28 +158,22 @@
 //!    assert_eq!(ret, json);
 //! ```
 
-
 #[macro_use]
 extern crate log;
 extern crate env_logger;
-
-#[cfg(test)]
-#[macro_use] extern crate serde_json;
-#[cfg(not(test))]
 extern crate serde_json;
-
-extern crate core;
 extern crate indexmap;
 
 #[doc(hidden)]
-pub mod parser;
+mod parser;
 #[doc(hidden)]
-pub mod filter;
+mod filter;
 #[doc(hidden)]
-pub mod ref_value;
+mod ref_value;
+pub mod prelude;
 
-use parser::parser::*;
-use filter::value_filter::*;
+use parser::prelude::*;
+use filter::prelude::*;
 
 use std::result;
 use serde_json::Value;
@@ -204,7 +198,7 @@ type Result = result::Result<Value, String>;
 /// "friends": [ {"id": 0}, {"id": 1} ]
 /// });
 ///
-/// let json = template(json_obj).unwrap();
+/// let json = template(&json_obj).unwrap();
 /// let ret = json!([ {"id": 0}, {"id": 0} ]);
 /// assert_eq!(json, ret);
 ///
@@ -216,11 +210,11 @@ type Result = result::Result<Value, String>;
 /// "friends": [ {"id": 0}, {"id": 1} ]
 /// });
 ///
-/// let json = template(json_obj).unwrap();
+/// let json = template(&json_obj).unwrap();
 /// let ret = json!([ {"id": 0}, {"name": "Millicent Norman"} ]);
 /// assert_eq!(json, ret);
 /// ```
-pub fn compile<'a>(path: &'a str) -> impl FnMut(Value) -> Result + 'a {
+pub fn compile<'a>(path: &'a str) -> impl FnMut(&Value) -> Result + 'a {
     let mut parser = Parser::new(path);
     let node = parser.compile();
     move |json| {
@@ -249,7 +243,7 @@ pub fn compile<'a>(path: &'a str) -> impl FnMut(Value) -> Result + 'a {
 /// "friends": [{"id": 0},{"id": 1}]
 /// });
 ///
-/// let mut selector = jsonpath::selector(json_obj);
+/// let mut selector = jsonpath::selector(&json_obj);
 ///
 /// let json = selector("$..friends[0]").unwrap();
 /// let ret = json!([ {"id": 0}, {"id": 0} ]);
@@ -259,7 +253,7 @@ pub fn compile<'a>(path: &'a str) -> impl FnMut(Value) -> Result + 'a {
 /// let ret = json!([ {"id": 1}, {"id": 1} ]);
 /// assert_eq!(json, ret);
 /// ```
-pub fn selector(json: Value) -> impl FnMut(&str) -> Result {
+pub fn selector(json: &Value) -> impl FnMut(&str) -> Result {
     let wrapper: RefValueWrapper = json.into();
     move |path: &str| {
         let mut jf = JsonValueFilter::new_from_value(wrapper.clone());
@@ -270,7 +264,7 @@ pub fn selector(json: Value) -> impl FnMut(&str) -> Result {
 }
 
 /// # Read the same Json multiple times using different JsonPath - Deprecated. use selector
-pub fn reader(json: Value) -> impl FnMut(&str) -> Result {
+pub fn reader(json: &Value) -> impl FnMut(&str) -> Result {
     selector(json)
 }
 
@@ -286,11 +280,11 @@ pub fn reader(json: Value) -> impl FnMut(&str) -> Result {
 /// },
 /// "friends": [{"id": 0}, {"id": 1}]
 /// });
-/// let json = jsonpath::select(json_obj, "$..friends[0]").unwrap();
+/// let json = jsonpath::select(&json_obj, "$..friends[0]").unwrap();
 /// let ret = json!([ {"id": 0}, {"id": 0} ]);
 /// assert_eq!(json, ret);
 /// ```
-pub fn select(json: Value, path: &str) -> Result {
+pub fn select(json: &Value, path: &str) -> Result {
     let mut jf = JsonValueFilter::new_from_value(json.into());
     let mut parser = Parser::new(path);
     parser.parse(&mut jf)?;
@@ -298,73 +292,7 @@ pub fn select(json: Value, path: &str) -> Result {
 }
 
 /// # Read Json using JsonPath - Deprecated. use select
-pub fn read(json: Value, path: &str) -> Result {
+pub fn read(json: &Value, path: &str) -> Result {
     select(json, path)
 }
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    use std::io::Read;
-
-    fn read_json(path: &str) -> Value {
-        let mut f = std::fs::File::open(path).unwrap();
-        let mut contents = String::new();
-        f.read_to_string(&mut contents).unwrap();
-        serde_json::from_str(contents.as_str()).unwrap()
-    }
-
-    #[test]
-    fn compile() {
-        let mut template = super::compile("$..friends[2]");
-        let json_obj = read_json("./benches/data_obj.json");
-        let json = template(json_obj).unwrap();
-        let ret = json!([
-            {"id": 2,"name": "Gray Berry"},
-            {"id": 2,"name": "Gray Berry"}
-        ]);
-        assert_eq!(json, ret);
-
-        let json_obj = read_json("./benches/data_array.json");
-        let json = template(json_obj).unwrap();
-        let ret = json!([
-            {"id": 2,"name": "Gray Berry"},
-            {"id": 2,"name": "Rosetta Erickson"}
-        ]);
-        assert_eq!(json, ret);
-    }
-
-    #[test]
-    fn selector() {
-        let json_obj = read_json("./benches/data_obj.json");
-        let mut reader = super::selector(json_obj);
-        let json = reader("$..friends[2]").unwrap();
-        let ret = json!([
-            {"id": 2,"name": "Gray Berry"},
-            {"id": 2,"name": "Gray Berry"}
-        ]);
-        assert_eq!(json, ret);
-
-        let json = reader("$..friends[0]").unwrap();
-        let ret = json!([
-            {"id": 0},
-            {"id": 0,"name": "Millicent Norman"}
-        ]);
-        assert_eq!(json, ret);
-    }
-
-    #[test]
-    fn select() {
-        let json_obj = read_json("./benches/example.json");
-        let json = super::select(json_obj, "$..book[2]").unwrap();
-        let ret = json!([{
-            "category" : "fiction",
-            "author" : "Herman Melville",
-            "title" : "Moby Dick",
-            "isbn" : "0-553-21311-3",
-            "price" : 8.99
-        }]);
-        assert_eq!(json, ret);
-    }
-}
\ No newline at end of file
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 56097e6..f5c15ce 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -1,3 +1,4 @@
 mod path_reader;
 mod tokenizer;
-pub mod parser;
\ No newline at end of file
+mod parser;
+pub mod prelude;
\ No newline at end of file
diff --git a/src/parser/parser.rs b/src/parser/parser.rs
index 4639149..7b3432c 100644
--- a/src/parser/parser.rs
+++ b/src/parser/parser.rs
@@ -1,19 +1,14 @@
-use std::result;
+use std::result::Result;
 
-use super::tokenizer::{
-    PreloadedTokenizer,
-    Token,
-    TokenError,
-};
+use super::tokenizer::*;
 
 const DUMMY: usize = 0;
 
-type Result<T> = result::Result<T, String>;
+type ParseResult<T> = Result<T, String>;
 
 mod utils {
-    use std::result;
 
-    pub fn string_to_isize<F>(string: &String, msg_handler: F) -> result::Result<isize, String>
+    pub fn string_to_isize<F>(string: &String, msg_handler: F) -> Result<isize, String>
         where F: Fn() -> String {
         match string.as_str().parse::<isize>() {
             Ok(n) => Ok(n),
@@ -21,7 +16,7 @@ mod utils {
         }
     }
 
-    pub fn string_to_f64<F>(string: &String, msg_handler: F) -> result::Result<f64, String>
+    pub fn string_to_f64<F>(string: &String, msg_handler: F) -> Result<f64, String>
         where F: Fn() -> String {
         match string.as_str().parse::<f64>() {
             Ok(n) => Ok(n),
@@ -88,17 +83,17 @@ impl<'a> Parser<'a> {
         Parser { tokenizer: PreloadedTokenizer::new(input) }
     }
 
-    pub fn compile(&mut self) -> Result<Node> {
+    pub fn compile(&mut self) -> ParseResult<Node> {
         Ok(self.json_path()?)
     }
 
-    pub fn parse<V: NodeVisitor>(&mut self, visitor: &mut V) -> Result<()> {
+    pub fn parse<V: NodeVisitor>(&mut self, visitor: &mut V) -> ParseResult<()> {
         let node = self.json_path()?;
         visitor.visit(node);
         Ok(())
     }
 
-    fn json_path(&mut self) -> Result<Node> {
+    fn json_path(&mut self) -> ParseResult<Node> {
         debug!("#json_path");
         match self.tokenizer.next_token() {
             Ok(Token::Absolute(_)) => {
@@ -111,7 +106,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn paths(&mut self, prev: Node) -> Result<Node> {
+    fn paths(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#paths");
         match self.tokenizer.peek_token() {
             Ok(Token::Dot(_)) => {
@@ -130,7 +125,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn paths_dot(&mut self, prev: Node) -> Result<Node> {
+    fn paths_dot(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#paths_dot");
         let node = self.path(prev)?;
         match self.tokenizer.peek_token() {
@@ -150,7 +145,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn path(&mut self, prev: Node) -> Result<Node> {
+    fn path(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#path");
         match self.tokenizer.peek_token() {
             Ok(Token::Dot(_)) => {
@@ -172,7 +167,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn path_leaves(&mut self, prev: Node) -> Result<Node> {
+    fn path_leaves(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#path_leaves");
         self.eat_token();
         match self.tokenizer.peek_token() {
@@ -190,7 +185,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn path_leaves_key(&mut self, prev: Node) -> Result<Node> {
+    fn path_leaves_key(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#path_leaves_key");
         Ok(Node {
             token: ParseToken::Leaves,
@@ -199,7 +194,7 @@ impl<'a> Parser<'a> {
         })
     }
 
-    fn path_leaves_all(&mut self, prev: Node) -> Result<Node> {
+    fn path_leaves_all(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#path_leaves_all");
         self.eat_token();
         Ok(Node {
@@ -209,7 +204,7 @@ impl<'a> Parser<'a> {
         })
     }
 
-    fn path_in_all(&mut self, prev: Node) -> Result<Node> {
+    fn path_in_all(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#path_in_all");
         self.eat_token();
         Ok(Node {
@@ -219,7 +214,7 @@ impl<'a> Parser<'a> {
         })
     }
 
-    fn path_in_key(&mut self, prev: Node) -> Result<Node> {
+    fn path_in_key(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#path_in_key");
         Ok(Node {
             token: ParseToken::In,
@@ -228,7 +223,7 @@ impl<'a> Parser<'a> {
         })
     }
 
-    fn key(&mut self) -> Result<Node> {
+    fn key(&mut self) -> ParseResult<Node> {
         debug!("#key");
         match self.tokenizer.next_token() {
             Ok(Token::Key(_, v)) => {
@@ -240,7 +235,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn array_quota_value(&mut self) -> Result<Node> {
+    fn array_quota_value(&mut self) -> ParseResult<Node> {
         debug!("#array_quota_value");
         match self.tokenizer.next_token() {
             Ok(Token::SingleQuoted(_, val))
@@ -256,7 +251,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn array_start(&mut self, prev: Node) -> Result<Node> {
+    fn array_start(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#array_start");
         match self.tokenizer.peek_token() {
             Ok(Token::Question(_)) => {
@@ -285,14 +280,14 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn array(&mut self, prev: Node) -> Result<Node> {
+    fn array(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#array");
         let ret = self.array_start(prev)?;
         self.eat_whitespace();
         self.close_token(ret, Token::CloseArray(DUMMY))
     }
 
-    fn array_value_key(&mut self) -> Result<Node> {
+    fn array_value_key(&mut self) -> ParseResult<Node> {
         debug!("#array_value_key");
         match self.tokenizer.next_token() {
             Ok(Token::Key(pos, ref val)) => {
@@ -318,7 +313,7 @@ impl<'a> Parser<'a> {
     }
 
 
-    fn array_value(&mut self) -> Result<Node> {
+    fn array_value(&mut self) -> ParseResult<Node> {
         debug!("#array_value");
         match self.tokenizer.peek_token() {
             Ok(Token::Key(_, _)) => {
@@ -342,7 +337,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn union(&mut self, num: isize) -> Result<Node> {
+    fn union(&mut self, num: isize) -> ParseResult<Node> {
         debug!("#union");
         let mut values = vec![num];
         while match self.tokenizer.peek_token() {
@@ -364,7 +359,7 @@ impl<'a> Parser<'a> {
         Ok(self.node(ParseToken::Union(values)))
     }
 
-    fn range_from(&mut self, num: isize) -> Result<Node> {
+    fn range_from(&mut self, num: isize) -> ParseResult<Node> {
         debug!("#range_from");
         self.eat_token();
         self.eat_whitespace();
@@ -378,7 +373,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn range_to(&mut self) -> Result<Node> {
+    fn range_to(&mut self) -> ParseResult<Node> {
         debug!("#range_to");
         match self.tokenizer.next_token() {
             Ok(Token::Key(pos, ref val)) => {
@@ -391,7 +386,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn range(&mut self, num: isize) -> Result<Node> {
+    fn range(&mut self, num: isize) -> ParseResult<Node> {
         debug!("#range");
         match self.tokenizer.next_token() {
             Ok(Token::Key(pos, ref val)) => {
@@ -404,7 +399,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn filter(&mut self) -> Result<Node> {
+    fn filter(&mut self) -> ParseResult<Node> {
         debug!("#filter");
         match self.tokenizer.next_token() {
             Ok(Token::OpenParenthesis(_)) => {
@@ -421,7 +416,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn exprs(&mut self) -> Result<Node> {
+    fn exprs(&mut self) -> ParseResult<Node> {
         self.eat_whitespace();
         debug!("#exprs");
         let node = match self.tokenizer.peek_token() {
@@ -441,7 +436,7 @@ impl<'a> Parser<'a> {
         self.condition_expr(node)
     }
 
-    fn condition_expr(&mut self, prev: Node) -> Result<Node> {
+    fn condition_expr(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#condition_expr");
         match self.tokenizer.peek_token() {
             Ok(Token::And(_)) => {
@@ -466,7 +461,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn expr(&mut self) -> Result<Node> {
+    fn expr(&mut self) -> ParseResult<Node> {
         debug!("#expr");
 
         let has_prop_candidate = match self.tokenizer.peek_token() {
@@ -494,7 +489,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn term_num(&mut self) -> Result<Node> {
+    fn term_num(&mut self) -> ParseResult<Node> {
         debug!("#term_num");
         match self.tokenizer.next_token() {
             Ok(Token::Key(pos, val)) => {
@@ -517,7 +512,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn term_num_float(&mut self, mut num: &str) -> Result<Node> {
+    fn term_num_float(&mut self, mut num: &str) -> ParseResult<Node> {
         debug!("#term_num_float");
         self.eat_token();
         match self.tokenizer.next_token() {
@@ -535,7 +530,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn term(&mut self) -> Result<Node> {
+    fn term(&mut self) -> ParseResult<Node> {
         debug!("#term");
         match self.tokenizer.peek_token() {
             Ok(Token::At(_)) => {
@@ -568,7 +563,7 @@ impl<'a> Parser<'a> {
         }
     }
 
-    fn op(&mut self, prev: Node) -> Result<Node> {
+    fn op(&mut self, prev: Node) -> ParseResult<Node> {
         debug!("#op");
         let token = match self.tokenizer.next_token() {
             Ok(Token::Equal(_)) => {
@@ -620,7 +615,7 @@ impl<'a> Parser<'a> {
         Node { left: None, right: None, token: token }
     }
 
-    fn close_token(&mut self, ret: Node, token: Token) -> Result<Node> {
+    fn close_token(&mut self, ret: Node, token: Token) -> ParseResult<Node> {
         debug!("#close_token");
         match self.tokenizer.next_token() {
             Ok(ref t) if t.partial_eq(token) => {
@@ -679,319 +674,4 @@ pub trait NodeVisitor {
 
     fn visit_token(&mut self, token: ParseToken);
     fn end_term(&mut self) {}
-}
-
-#[cfg(test)]
-mod tests {
-    extern crate env_logger;
-
-    use super::*;
-
-    struct NodeVisitorTestImpl<'a> {
-        input: &'a str,
-        stack: Vec<ParseToken>,
-    }
-
-    impl<'a> NodeVisitorTestImpl<'a> {
-        fn new(input: &'a str) -> Self {
-            NodeVisitorTestImpl { input, stack: Vec::new() }
-        }
-
-        fn visit(&mut self) -> result::Result<Vec<ParseToken>, String> {
-            let tokenizer = PreloadedTokenizer::new(self.input);
-            let mut parser = Parser { tokenizer };
-            parser.parse(self)?;
-            Ok(self.stack.split_off(0))
-        }
-    }
-
-    impl<'a> NodeVisitor for NodeVisitorTestImpl<'a> {
-        fn visit_token(&mut self, token: ParseToken) {
-            self.stack.push(token);
-        }
-    }
-
-    fn setup() {
-        let _ = env_logger::try_init();
-    }
-
-    fn run(input: &str) -> result::Result<Vec<ParseToken>, String> {
-        let mut interpreter = NodeVisitorTestImpl::new(input);
-        interpreter.visit()
-    }
-
-    #[test]
-    fn parse_path() {
-        setup();
-
-        assert_eq!(run("$.aa"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::In,
-            ParseToken::Key("aa".to_owned())
-        ]));
-
-        assert_eq!(run("$.00.a"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::In,
-            ParseToken::Key("00".to_owned()),
-            ParseToken::In,
-            ParseToken::Key("a".to_owned())
-        ]));
-
-        assert_eq!(run("$.00.韓창.seok"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::In,
-            ParseToken::Key("00".to_owned()),
-            ParseToken::In,
-            ParseToken::Key("韓창".to_owned()),
-            ParseToken::In,
-            ParseToken::Key("seok".to_owned())
-        ]));
-
-        assert_eq!(run("$.*"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::In,
-            ParseToken::All
-        ]));
-
-        assert_eq!(run("$..*"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Leaves,
-            ParseToken::All
-        ]));
-
-        assert_eq!(run("$..[0]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Leaves,
-            ParseToken::Array,
-            ParseToken::Number(0.0),
-            ParseToken::ArrayEof
-        ]));
-
-        match run("$.") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$..") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$. a") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-    }
-
-    #[test]
-    fn parse_array_sytax() {
-        setup();
-
-        assert_eq!(run("$.book[?(@.isbn)]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::In,
-            ParseToken::Key("book".to_string()),
-            ParseToken::Array,
-            ParseToken::Relative,
-            ParseToken::In,
-            ParseToken::Key("isbn".to_string()),
-            ParseToken::ArrayEof
-        ]));
-
-        //
-        // Array도 컨텍스트 In으로 간주 할거라서 중첩되면 하나만
-        //
-        assert_eq!(run("$.[*]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::All,
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[*]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::All,
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[*].가"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::All,
-            ParseToken::ArrayEof,
-            ParseToken::In, ParseToken::Key("가".to_owned())
-        ]));
-
-        assert_eq!(run("$.a[0][1]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Number(0_f64),
-            ParseToken::ArrayEof,
-            ParseToken::Array,
-            ParseToken::Number(1_f64),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[1,2]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Union(vec![1, 2]),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[10:]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Range(Some(10), None),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[:11]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Range(None, Some(11)),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[-12:13]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Range(Some(-12), Some(13)),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[?(1>2)]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Number(1_f64), ParseToken::Number(2_f64), ParseToken::Filter(FilterToken::Greater),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$.a[?($.b>3)]"), Ok(vec![
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Array,
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("b".to_owned()), ParseToken::Number(3_f64), ParseToken::Filter(FilterToken::Greater),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$[?($.c>@.d && 1==2)]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("c".to_owned()),
-            ParseToken::Relative, ParseToken::In, ParseToken::Key("d".to_owned()),
-            ParseToken::Filter(FilterToken::Greater),
-            ParseToken::Number(1_f64), ParseToken::Number(2_f64), ParseToken::Filter(FilterToken::Equal),
-            ParseToken::Filter(FilterToken::And),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$[?($.c>@.d&&(1==2||3>=4))]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::Absolute, ParseToken::In, ParseToken::Key("c".to_owned()),
-            ParseToken::Relative, ParseToken::In, ParseToken::Key("d".to_owned()),
-            ParseToken::Filter(FilterToken::Greater),
-            ParseToken::Number(1_f64), ParseToken::Number(2_f64), ParseToken::Filter(FilterToken::Equal),
-            ParseToken::Number(3_f64), ParseToken::Number(4_f64), ParseToken::Filter(FilterToken::GreaterOrEqual),
-            ParseToken::Filter(FilterToken::Or),
-            ParseToken::Filter(FilterToken::And),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$[?(@.a<@.b)]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::Relative, ParseToken::In, ParseToken::Key("a".to_owned()),
-            ParseToken::Relative, ParseToken::In, ParseToken::Key("b".to_owned()),
-            ParseToken::Filter(FilterToken::Little),
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$[*][*][*]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::All,
-            ParseToken::ArrayEof,
-            ParseToken::Array,
-            ParseToken::All,
-            ParseToken::ArrayEof,
-            ParseToken::Array,
-            ParseToken::All,
-            ParseToken::ArrayEof
-        ]));
-
-        assert_eq!(run("$['a']['bb']"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::Key("a".to_string()),
-            ParseToken::ArrayEof,
-            ParseToken::Array,
-            ParseToken::Key("bb".to_string()),
-            ParseToken::ArrayEof
-        ]));
-
-        match run("$[") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[a]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[?($.a)]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[?(@.a > @.b]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[?(@.a < @.b&&(@.c < @.d)]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-    }
-
-    #[test]
-    fn parse_array_float() {
-        setup();
-
-        assert_eq!(run("$[?(1.1<2.1)]"), Ok(vec![
-            ParseToken::Absolute,
-            ParseToken::Array,
-            ParseToken::Number(1.1), ParseToken::Number(2.1), ParseToken::Filter(FilterToken::Little),
-            ParseToken::ArrayEof
-        ]));
-
-        match run("$[1.1]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[?(1.1<.2)]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[?(1.1<2.)]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-
-        match run("$[?(1.1<2.a)]") {
-            Ok(_) => panic!(),
-            _ => {}
-        }
-    }
 }
\ No newline at end of file
diff --git a/src/parser/path_reader.rs b/src/parser/path_reader.rs
index b3e4da9..297821e 100644
--- a/src/parser/path_reader.rs
+++ b/src/parser/path_reader.rs
@@ -1,4 +1,4 @@
-use std::result;
+use std::result::Result;
 
 #[derive(Debug, PartialEq)]
 pub enum ReaderError {
@@ -18,12 +18,12 @@ impl<'a> PathReader<'a> {
         }
     }
 
-    pub fn peek_char(&self) -> result::Result<(usize, char), ReaderError> {
+    pub fn peek_char(&self) -> Result<(usize, char), ReaderError> {
         let ch = self.input.chars().next().ok_or(ReaderError::Eof)?;
         Ok((self.pos + ch.len_utf8(), ch))
     }
 
-    pub fn take_while<F>(&mut self, fun: F) -> result::Result<(usize, String), ReaderError>
+    pub fn take_while<F>(&mut self, fun: F) -> Result<(usize, String), ReaderError>
         where
             F: Fn(&char) -> bool
     {
@@ -42,7 +42,7 @@ impl<'a> PathReader<'a> {
         Ok((self.pos, ret))
     }
 
-    pub fn next_char(&mut self) -> result::Result<(usize, char), ReaderError> {
+    pub fn next_char(&mut self) -> Result<(usize, char), ReaderError> {
         let (_, ch) = self.peek_char()?;
         self.input = &self.input[ch.len_utf8()..];
         let ret = Ok((self.pos, ch));
diff --git a/src/parser/prelude.rs b/src/parser/prelude.rs
new file mode 100644
index 0000000..09315fa
--- /dev/null
+++ b/src/parser/prelude.rs
@@ -0,0 +1,2 @@
+pub use super::parser::*;
+pub use super::tokenizer::*;
\ No newline at end of file
diff --git a/src/parser/tokenizer.rs b/src/parser/tokenizer.rs
index d08b0a2..9090a06 100644
--- a/src/parser/tokenizer.rs
+++ b/src/parser/tokenizer.rs
@@ -1,10 +1,7 @@
-use std::result;
 use std::io::Write;
+use std::result::Result;
 
-use super::path_reader::{
-    ReaderError,
-    PathReader,
-};
+use super::path_reader::{PathReader, ReaderError};
 
 const ABSOLUTE: &'static str = "$";
 const DOT: &'static str = ".";
@@ -90,7 +87,6 @@ pub enum Token {
 }
 
 impl Token {
-
     pub fn partial_eq(&self, other: Token) -> bool {
         self.to_simple() == other.to_simple()
     }
@@ -152,19 +148,19 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn single_quota(&mut self, pos: usize, ch: char) -> result::Result<Token, TokenError> {
+    fn single_quota(&mut self, pos: usize, ch: char) -> Result<Token, TokenError> {
         let (_, val) = self.input.take_while(|c| *c != ch).map_err(to_token_error)?;
         self.input.next_char().map_err(to_token_error)?;
         Ok(Token::SingleQuoted(pos, val))
     }
 
-    fn double_quota(&mut self, pos: usize, ch: char) -> result::Result<Token, TokenError> {
+    fn double_quota(&mut self, pos: usize, ch: char) -> Result<Token, TokenError> {
         let (_, val) = self.input.take_while(|c| *c != ch).map_err(to_token_error)?;
         self.input.next_char().map_err(to_token_error)?;
         Ok(Token::DoubleQuoted(pos, val))
     }
 
-    fn equal(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn equal(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, ch) = self.input.peek_char().map_err(to_token_error)?;
         match ch {
             CH_EQUAL => {
@@ -175,7 +171,7 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn not_equal(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn not_equal(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, ch) = self.input.peek_char().map_err(to_token_error)?;
         match ch {
             CH_EQUAL => {
@@ -186,7 +182,7 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn little(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn little(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, ch) = self.input.peek_char().map_err(to_token_error)?;
         match ch {
             CH_EQUAL => {
@@ -197,7 +193,7 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn greater(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn greater(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, ch) = self.input.peek_char().map_err(to_token_error)?;
         match ch {
             CH_EQUAL => {
@@ -208,7 +204,7 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn and(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn and(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, ch) = self.input.peek_char().map_err(to_token_error)?;
         match ch {
             CH_AMPERSAND => {
@@ -219,7 +215,7 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn or(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn or(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, ch) = self.input.peek_char().map_err(to_token_error)?;
         match ch {
             CH_PIPE => {
@@ -230,12 +226,12 @@ impl<'a> Tokenizer<'a> {
         }
     }
 
-    fn whitespace(&mut self, pos: usize, _: char) -> result::Result<Token, TokenError> {
+    fn whitespace(&mut self, pos: usize, _: char) -> Result<Token, TokenError> {
         let (_, vec) = self.input.take_while(|c| c.is_whitespace()).map_err(to_token_error)?;
         Ok(Token::Whitespace(pos, vec.len()))
     }
 
-    fn other(&mut self, pos: usize, ch: char) -> result::Result<Token, TokenError> {
+    fn other(&mut self, pos: usize, ch: char) -> Result<Token, TokenError> {
         let fun = |c: &char| {
             match simple_matched_token(*c, pos) {
                 Some(_) => false,
@@ -253,7 +249,7 @@ impl<'a> Tokenizer<'a> {
         Ok(Token::Key(pos, vec))
     }
 
-    pub fn next_token(&mut self) -> result::Result<Token, TokenError> {
+    pub fn next_token(&mut self) -> Result<Token, TokenError> {
         let (pos, ch) = self.input.next_char().map_err(to_token_error)?;
         match simple_matched_token(ch, pos) {
             Some(t) => Ok(t),
@@ -309,7 +305,7 @@ impl<'a> PreloadedTokenizer<'a> {
         }
     }
 
-    pub fn peek_token(&self) -> result::Result<&Token, TokenError> {
+    pub fn peek_token(&self) -> Result<&Token, TokenError> {
         match self.tokens.last() {
             Some((_, t)) => {
                 trace!("%{:?}", t);
@@ -322,7 +318,7 @@ impl<'a> PreloadedTokenizer<'a> {
         }
     }
 
-    pub fn next_token(&mut self) -> result::Result<Token, TokenError> {
+    pub fn next_token(&mut self) -> Result<Token, TokenError> {
         match self.tokens.pop() {
             Some((pos, t)) => {
                 self.curr_pos = Some(pos);
@@ -356,205 +352,4 @@ impl<'a> PreloadedTokenizer<'a> {
             }
         }
     }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::TokenError;
-    use super::{
-        Token,
-        Tokenizer,
-        PreloadedTokenizer,
-    };
-
-    fn collect_token(input: &str) -> (Vec<Token>, Option<TokenError>) {
-        let mut tokenizer = Tokenizer::new(input);
-        let mut vec = vec![];
-        loop {
-            match tokenizer.next_token() {
-                Ok(t) => vec.push(t),
-                Err(e) => return (vec, Some(e)),
-            }
-        }
-    }
-
-    fn run(input: &str, expected: (Vec<Token>, Option<TokenError>)) {
-        let (vec, err) = collect_token(input.clone());
-        assert_eq!((vec, err), expected, "\"{}\"", input);
-    }
-
-    #[test]
-    fn peek() {
-        let mut tokenizer = PreloadedTokenizer::new("$.a");
-        match tokenizer.next_token() {
-            Ok(t) => assert_eq!(Token::Absolute(0), t),
-            _ => panic!()
-        }
-
-        match tokenizer.peek_token() {
-            Ok(t) => assert_eq!(&Token::Dot(1), t),
-            _ => panic!()
-        }
-
-        match tokenizer.peek_token() {
-            Ok(t) => assert_eq!(&Token::Dot(1), t),
-            _ => panic!()
-        }
-
-        match tokenizer.next_token() {
-            Ok(t) => assert_eq!(Token::Dot(1), t),
-            _ => panic!()
-        }
-    }
-
-    #[test]
-    fn token() {
-        run("$.01.a",
-            (
-                vec![
-                    Token::Absolute(0),
-                    Token::Dot(1),
-                    Token::Key(2, "01".to_string()),
-                    Token::Dot(4),
-                    Token::Key(5, "a".to_string())
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("$.   []",
-            (
-                vec![
-                    Token::Absolute(0),
-                    Token::Dot(1),
-                    Token::Whitespace(2, 2),
-                    Token::OpenArray(5),
-                    Token::CloseArray(6)
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("$..",
-            (
-                vec![
-                    Token::Absolute(0),
-                    Token::Dot(1),
-                    Token::Dot(2),
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("$..ab",
-            (
-                vec![
-                    Token::Absolute(0),
-                    Token::Dot(1),
-                    Token::Dot(2),
-                    Token::Key(3, "ab".to_string())
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("$..가 [",
-            (
-                vec![
-                    Token::Absolute(0),
-                    Token::Dot(1),
-                    Token::Dot(2),
-                    Token::Key(3, "가".to_string()),
-                    Token::Whitespace(6, 0),
-                    Token::OpenArray(7),
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("[-1, 2 ]",
-            (
-                vec![
-                    Token::OpenArray(0),
-                    Token::Key(1, "-1".to_string()),
-                    Token::Comma(3),
-                    Token::Whitespace(4, 0),
-                    Token::Key(5, "2".to_string()),
-                    Token::Whitespace(6, 0),
-                    Token::CloseArray(7),
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("[ 1 2 , 3 \"abc\" : -10 ]",
-            (
-                vec![
-                    Token::OpenArray(0),
-                    Token::Whitespace(1, 0),
-                    Token::Key(2, "1".to_string()),
-                    Token::Whitespace(3, 0),
-                    Token::Key(4, "2".to_string()),
-                    Token::Whitespace(5, 0),
-                    Token::Comma(6),
-                    Token::Whitespace(7, 0),
-                    Token::Key(8, "3".to_string()),
-                    Token::Whitespace(9, 0),
-                    Token::DoubleQuoted(10, "abc".to_string()),
-                    Token::Whitespace(15, 0),
-                    Token::Split(16),
-                    Token::Whitespace(17, 0),
-                    Token::Key(18, "-10".to_string()),
-                    Token::Whitespace(21, 0),
-                    Token::CloseArray(22),
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("?(@.a가 <41.01)",
-            (
-                vec![
-                    Token::Question(0),
-                    Token::OpenParenthesis(1),
-                    Token::At(2),
-                    Token::Dot(3),
-                    Token::Key(4, "a가".to_string()),
-                    Token::Whitespace(8, 0),
-                    Token::Little(9),
-                    Token::Key(10, "41".to_string()),
-                    Token::Dot(12),
-                    Token::Key(13, "01".to_string()),
-                    Token::CloseParenthesis(15),
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("?(@.a <4a.01)",
-            (
-                vec![
-                    Token::Question(0),
-                    Token::OpenParenthesis(1),
-                    Token::At(2),
-                    Token::Dot(3),
-                    Token::Key(4, "a".to_string()),
-                    Token::Whitespace(5, 0),
-                    Token::Little(6),
-                    Token::Key(7, "4a".to_string()),
-                    Token::Dot(9),
-                    Token::Key(10, "01".to_string()),
-                    Token::CloseParenthesis(12),
-                ]
-                , Some(TokenError::Eof)
-            ));
-
-        run("?($.c>@.d)", (
-            vec![
-                Token::Question(0),
-                Token::OpenParenthesis(1),
-                Token::Absolute(2),
-                Token::Dot(3),
-                Token::Key(4, "c".to_string()),
-                Token::Greater(5),
-                Token::At(6),
-                Token::Dot(7),
-                Token::Key(8, "d".to_string()),
-                Token::CloseParenthesis(9)
-            ]
-            , Some(TokenError::Eof)
-        ));
-    }
 }
\ No newline at end of file
diff --git a/src/prelude.rs b/src/prelude.rs
new file mode 100644
index 0000000..91c3ae2
--- /dev/null
+++ b/src/prelude.rs
@@ -0,0 +1,3 @@
+pub use parser::prelude::*;
+pub use filter::prelude::*;
+pub use ref_value::*;
\ No newline at end of file
diff --git a/src/ref_value/mod.rs b/src/ref_value/mod.rs
index 761e10a..cb5310b 100644
--- a/src/ref_value/mod.rs
+++ b/src/ref_value/mod.rs
@@ -5,8 +5,7 @@ use std::sync::Arc;
 use std::convert::Into;
 
 use indexmap::map::IndexMap;
-use serde_json::Number;
-use serde_json::Value;
+use serde_json::{Number, Value};
 
 pub type TypeRefValue = Arc<Box<RefValue>>;
 
@@ -81,7 +80,7 @@ impl RefIndex for str {
         match *v {
             RefValue::Object(ref mut map) => {
                 map.entry(self.to_owned()).or_insert(RefValueWrapper::wrap(RefValue::Null))
-            },
+            }
             _ => panic!("cannot access key {:?} in JSON {:?}", self, v),
         }
     }
@@ -182,7 +181,7 @@ impl RefValueWrapper {
     }
 }
 
-impl Into<RefValueWrapper> for Value {
+impl Into<RefValueWrapper> for &Value {
     fn into(self) -> RefValueWrapper {
         let ref_val = RefValueConverter::new(self);
         RefValueWrapper::new(ref_val)
@@ -275,7 +274,6 @@ impl RefValue {
 }
 
 impl Into<RefValueWrapper> for RefValue {
-
     fn into(self) -> RefValueWrapper {
         let wrap = RefValueWrapper::wrap(self);
         RefValueWrapper::new(wrap)
@@ -285,11 +283,11 @@ impl Into<RefValueWrapper> for RefValue {
 struct RefValueConverter;
 
 impl RefValueConverter {
-    fn new(value: Value) -> TypeRefValue {
+    fn new(value: &Value) -> TypeRefValue {
         RefValueConverter {}.visit_value(value)
     }
 
-    fn visit_value(&self, value: Value) -> TypeRefValue {
+    fn visit_value(&self, value: &Value) -> TypeRefValue {
         match value {
             Value::Null => self.visit_null(),
             Value::Bool(v) => self.visit_bool(v),
@@ -302,29 +300,29 @@ impl RefValueConverter {
     fn visit_null(&self) -> TypeRefValue {
         RefValueWrapper::wrap(RefValue::Null)
     }
-    fn visit_bool(&self, value: bool) -> TypeRefValue {
-        RefValueWrapper::wrap(RefValue::Bool(value))
+    fn visit_bool(&self, value: &bool) -> TypeRefValue {
+        RefValueWrapper::wrap(RefValue::Bool(*value))
     }
-    fn visit_number(&self, value: serde_json::Number) -> TypeRefValue {
-        RefValueWrapper::wrap(RefValue::Number(value))
+    fn visit_number(&self, value: &serde_json::Number) -> TypeRefValue {
+        RefValueWrapper::wrap(RefValue::Number(value.clone()))
     }
-    fn visit_string(&self, value: String) -> TypeRefValue {
+    fn visit_string(&self, value: &String) -> TypeRefValue {
         RefValueWrapper::wrap(RefValue::String(value.to_string()))
     }
-    fn visit_array(&self, value: Vec<Value>) -> TypeRefValue {
+    fn visit_array(&self, value: &Vec<Value>) -> TypeRefValue {
         let mut values = Vec::new();
         for v in value {
             values.push(self.visit_value(v));
         }
         RefValueWrapper::wrap(RefValue::Array(values))
     }
-    fn visit_object(&self, mut value: serde_json::Map<String, Value>) -> TypeRefValue {
+    fn visit_object(&self, value: &serde_json::Map<String, Value>) -> TypeRefValue {
         let mut map = IndexMap::new();
         let keys: Vec<String> = value.keys().into_iter().map(|k| k.to_string()).collect();
         for k in keys {
-            let value = self.visit_value(match value.get_mut(&k) {
-                Some(v) => v.take(),
-                _ => Value::Null
+            let value = self.visit_value(match value.get(&k) {
+                Some(v) => v,
+                _ => &Value::Null
             });
             map.insert(k, value);
         }
diff --git a/tests/filter.rs b/tests/filter.rs
new file mode 100644
index 0000000..7854698
--- /dev/null
+++ b/tests/filter.rs
@@ -0,0 +1,345 @@
+extern crate env_logger;
+extern crate jsonpath_lib as jsonpath;
+#[macro_use]
+extern crate serde_json;
+
+use std::io::Read;
+
+use serde_json::Value;
+
+use jsonpath::prelude::*;
+
+fn setup() {
+    let _ = env_logger::try_init();
+}
+
+fn new_value_filter(file: &str) -> ValueFilter {
+    let string = read_json(file);
+    let json: Value = serde_json::from_str(string.as_str()).unwrap();
+    ValueFilter::new((&json).into(), false, false)
+}
+
+fn do_filter(path: &str, file: &str) -> JsonValueFilter {
+    let string = read_json(file);
+    let mut jf = JsonValueFilter::new(string.as_str()).unwrap();
+    let mut parser = Parser::new(path);
+    parser.parse(&mut jf).unwrap();
+    jf
+}
+
+fn read_json(path: &str) -> String {
+    let mut f = std::fs::File::open(path).unwrap();
+    let mut contents = String::new();
+    f.read_to_string(&mut contents).unwrap();
+    contents
+}
+
+#[test]
+fn step_in() {
+    setup();
+
+    let mut jf = new_value_filter("./benches/data_obj.json");
+    {
+        let current = jf.step_in_str("friends");
+        assert_eq!(current.is_array(), true);
+    }
+
+    let mut jf = new_value_filter("./benches/data_array.json");
+    {
+        let current = jf.step_in_num(&1.0);
+        assert_eq!(current.get_val().is_object(), true);
+    }
+    {
+        let current = jf.step_in_str("friends");
+        assert_eq!(current.is_array(), true);
+    }
+    let mut jf = new_value_filter("./benches/data_obj.json");
+    {
+        jf.step_in_str("school");
+        jf.step_in_str("friends");
+        jf.step_in_all();
+        let current = jf.step_in_str("name");
+        let friends = json!([
+                "Millicent Norman",
+                "Vincent Cannon",
+                "Gray Berry"
+            ]);
+        assert_eq!(friends, current.get_val().into_value());
+    }
+    let mut jf = new_value_filter("./benches/data_obj.json");
+    {
+        let current = jf.step_leaves_str("name");
+        let names = json!([
+                "Leonor Herman",
+                "Millicent Norman",
+                "Vincent Cannon",
+                "Gray Berry",
+                "Vincent Cannon",
+                "Gray Berry"
+            ]);
+        assert_eq!(names, current.get_val().into_value());
+    }
+}
+
+#[test]
+fn array() {
+    setup();
+
+    let friends = json!([
+            {"id": 1, "name": "Vincent Cannon" },
+            {"id": 2, "name": "Gray Berry"}
+        ]);
+
+    let jf = do_filter("$.school.friends[1, 2]", "./benches/data_obj.json");
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.school.friends[1:]", "./benches/data_obj.json");
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.school.friends[:-2]", "./benches/data_obj.json");
+    let friends = json!([
+            {"id": 0, "name": "Millicent Norman"}
+        ]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$..friends[2].name", "./benches/data_obj.json");
+    let friends = json!(["Gray Berry", "Gray Berry"]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$..friends[*].name", "./benches/data_obj.json");
+    let friends = json!(["Vincent Cannon","Gray Berry","Millicent Norman","Vincent Cannon","Gray Berry"]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$['school']['friends'][*].['name']", "./benches/data_obj.json");
+    let friends = json!(["Millicent Norman","Vincent Cannon","Gray Berry"]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$['school']['friends'][0].['name']", "./benches/data_obj.json");
+    let friends = json!("Millicent Norman");
+    assert_eq!(friends, jf.current_value().into_value());
+}
+
+#[test]
+fn return_type() {
+    setup();
+
+    let friends = json!({
+            "friends": [
+                {"id": 0, "name": "Millicent Norman"},
+                {"id": 1, "name": "Vincent Cannon" },
+                {"id": 2, "name": "Gray Berry"}
+            ]
+        });
+
+    let jf = do_filter("$.school", "./benches/data_obj.json");
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.school[?(@.friends[0])]", "./benches/data_obj.json");
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.school[?(@.friends[10])]", "./benches/data_obj.json");
+    assert_eq!(Value::Null, jf.current_value().into_value());
+
+    let jf = do_filter("$.school[?(1==1)]", "./benches/data_obj.json");
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.school.friends[?(1==1)]", "./benches/data_obj.json");
+    let friends = json!([
+            {"id": 0, "name": "Millicent Norman"},
+            {"id": 1, "name": "Vincent Cannon" },
+            {"id": 2, "name": "Gray Berry"}
+        ]);
+    assert_eq!(friends, jf.current_value().into_value());
+}
+
+#[test]
+fn op() {
+    setup();
+
+    let jf = do_filter("$.school[?(@.friends == @.friends)]", "./benches/data_obj.json");
+    let friends = json!({
+            "friends": [
+                {"id": 0, "name": "Millicent Norman"},
+                {"id": 1, "name": "Vincent Cannon" },
+                {"id": 2, "name": "Gray Berry"}
+            ]
+        });
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.friends[?(@.name)]", "./benches/data_obj.json");
+    let friends = json!([
+            { "id" : 1, "name" : "Vincent Cannon" },
+            { "id" : 2, "name" : "Gray Berry" }
+        ]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.friends[?(@.id >= 2)]", "./benches/data_obj.json");
+    let friends = json!([
+            { "id" : 2, "name" : "Gray Berry" }
+        ]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.friends[?(@.id >= 2 || @.id == 1)]", "./benches/data_obj.json");
+    let friends = json!([
+            { "id" : 2, "name" : "Gray Berry" },
+            { "id" : 1, "name" : "Vincent Cannon" }
+        ]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$.friends[?( (@.id >= 2 || @.id == 1) && @.id == 0)]", "./benches/data_obj.json");
+    assert_eq!(Value::Null, jf.current_value().into_value());
+
+    let jf = do_filter("$..friends[?(@.id == $.index)].id", "./benches/data_obj.json");
+    let friends = json!([0, 0]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[?($.store.bicycle.price < @.price)].price", "./benches/example.json");
+    let friends = json!([22.99]);
+    assert_eq!(friends, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[?( (@.price == 12.99 || @.category == 'reference') && @.price > 10)].price", "./benches/example.json");
+    let friends = json!([12.99]);
+    assert_eq!(friends, jf.current_value().into_value());
+}
+
+#[test]
+fn example() {
+    setup();
+
+    let jf = do_filter("$.store.book[*].author", "./benches/example.json");
+    let ret = json!(["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..author", "./benches/example.json");
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$.store.*", "./benches/example.json");
+    let ret = json!([
+        [
+            {"category" : "reference", "author" : "Nigel Rees","title" : "Sayings of the Century", "price" : 8.95},
+            {"category" : "fiction", "author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99},
+            {"category" : "fiction", "author" : "Herman Melville","title" : "Moby Dick","isbn" : "0-553-21311-3","price" : 8.99},
+            {"category" : "fiction", "author" : "J. R. R. Tolkien","title" : "The Lord of the Rings","isbn" : "0-395-19395-8","price" : 22.99}
+        ],
+        {"color" : "red","price" : 19.95},
+        ]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$.store..price", "./benches/example.json");
+    let ret = json!([8.95, 12.99, 8.99, 22.99, 19.95]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[2]", "./benches/example.json");
+    let ret = json!([{
+            "category" : "fiction",
+            "author" : "Herman Melville",
+            "title" : "Moby Dick",
+            "isbn" : "0-553-21311-3",
+            "price" : 8.99
+        }]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[-2]", "./benches/example.json");
+    let ret = json!([{
+            "category" : "fiction",
+            "author" : "Herman Melville",
+            "title" : "Moby Dick",
+            "isbn" : "0-553-21311-3",
+            "price" : 8.99
+        }]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[0,1]", "./benches/example.json");
+    let ret = json!([
+            {
+                "category" : "reference",
+                "author" : "Nigel Rees",
+                "title" : "Sayings of the Century",
+                "price" : 8.95
+            },
+            {
+                "category" : "fiction",
+                "author" : "Evelyn Waugh",
+                "title" : "Sword of Honour",
+                "price" : 12.99
+            }
+        ]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[:2]", "./benches/example.json");
+    let ret = json!([
+           {
+              "category" : "reference",
+              "author" : "Nigel Rees",
+              "title" : "Sayings of the Century",
+              "price" : 8.95
+           },
+           {
+              "category" : "fiction",
+              "author" : "Evelyn Waugh",
+              "title" : "Sword of Honour",
+              "price" : 12.99
+           }
+        ]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[2:]", "./benches/example.json");
+    let ret = json!([
+           {
+              "category" : "fiction",
+              "author" : "Herman Melville",
+              "title" : "Moby Dick",
+              "isbn" : "0-553-21311-3",
+              "price" : 8.99
+           },
+           {
+              "category" : "fiction",
+              "author" : "J. R. R. Tolkien",
+              "title" : "The Lord of the Rings",
+              "isbn" : "0-395-19395-8",
+              "price" : 22.99
+           }
+        ]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..book[?(@.isbn)]", "./benches/example.json");
+    let ret = json!([
+           {
+              "category" : "fiction",
+              "author" : "Herman Melville",
+              "title" : "Moby Dick",
+              "isbn" : "0-553-21311-3",
+              "price" : 8.99
+           },
+           {
+              "category" : "fiction",
+              "author" : "J. R. R. Tolkien",
+              "title" : "The Lord of the Rings",
+              "isbn" : "0-395-19395-8",
+              "price" : 22.99
+           }
+        ]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$.store.book[?(@.price < 10)]", "./benches/example.json");
+    let ret = json!([
+           {
+              "category" : "reference",
+              "author" : "Nigel Rees",
+              "title" : "Sayings of the Century",
+              "price" : 8.95
+           },
+           {
+              "category" : "fiction",
+              "author" : "Herman Melville",
+              "title" : "Moby Dick",
+              "isbn" : "0-553-21311-3",
+              "price" : 8.99
+           }
+        ]);
+    assert_eq!(ret, jf.current_value().into_value());
+
+    let jf = do_filter("$..*", "./benches/example.json");
+    let json: Value = serde_json::from_str(read_json("./benches/giveme_every_thing_result.json").as_str()).unwrap();
+    assert_eq!(json, jf.current_value().into_value());
+}
\ No newline at end of file
diff --git a/tests/lib.rs b/tests/lib.rs
new file mode 100644
index 0000000..d19a9e1
--- /dev/null
+++ b/tests/lib.rs
@@ -0,0 +1,69 @@
+extern crate env_logger;
+extern crate jsonpath_lib as jsonpath;
+extern crate log;
+#[macro_use]
+extern crate serde_json;
+
+use std::io::Read;
+
+use serde_json::Value;
+
+fn read_json(path: &str) -> Value {
+    let mut f = std::fs::File::open(path).unwrap();
+    let mut contents = String::new();
+    f.read_to_string(&mut contents).unwrap();
+    serde_json::from_str(contents.as_str()).unwrap()
+}
+
+#[test]
+fn compile() {
+    let mut template = jsonpath::compile("$..friends[2]");
+    let json_obj = read_json("./benches/data_obj.json");
+    let json = template(&json_obj).unwrap();
+    let ret = json!([
+            {"id": 2,"name": "Gray Berry"},
+            {"id": 2,"name": "Gray Berry"}
+        ]);
+    assert_eq!(json, ret);
+
+    let json_obj = read_json("./benches/data_array.json");
+    let json = template(&json_obj).unwrap();
+    let ret = json!([
+            {"id": 2,"name": "Gray Berry"},
+            {"id": 2,"name": "Rosetta Erickson"}
+        ]);
+    assert_eq!(json, ret);
+}
+
+#[test]
+fn selector() {
+    let json_obj = read_json("./benches/data_obj.json");
+    let mut reader = jsonpath::selector(&json_obj);
+    let json = reader("$..friends[2]").unwrap();
+    let ret = json!([
+            {"id": 2,"name": "Gray Berry"},
+            {"id": 2,"name": "Gray Berry"}
+        ]);
+    assert_eq!(json, ret);
+
+    let json = reader("$..friends[0]").unwrap();
+    let ret = json!([
+            {"id": 0},
+            {"id": 0,"name": "Millicent Norman"}
+        ]);
+    assert_eq!(json, ret);
+}
+
+#[test]
+fn select() {
+    let json_obj = read_json("./benches/example.json");
+    let json = jsonpath::select(&json_obj, "$..book[2]").unwrap();
+    let ret = json!([{
+            "category" : "fiction",
+            "author" : "Herman Melville",
+            "title" : "Moby Dick",
+            "isbn" : "0-553-21311-3",
+            "price" : 8.99
+        }]);
+    assert_eq!(json, ret);
+}
\ No newline at end of file
diff --git a/tests/parser.rs b/tests/parser.rs
new file mode 100644
index 0000000..b51d0d3
--- /dev/null
+++ b/tests/parser.rs
@@ -0,0 +1,313 @@
+extern crate env_logger;
+extern crate jsonpath_lib as jsonpath;
+
+use std::result;
+
+use jsonpath::prelude::*;
+
+struct NodeVisitorTestImpl<'a> {
+    input: &'a str,
+    stack: Vec<ParseToken>,
+}
+
+impl<'a> NodeVisitorTestImpl<'a> {
+    fn new(input: &'a str) -> Self {
+        NodeVisitorTestImpl { input, stack: Vec::new() }
+    }
+
+    fn visit(&mut self) -> result::Result<Vec<ParseToken>, String> {
+        let mut parser = Parser::new(self.input);
+        parser.parse(self)?;
+        Ok(self.stack.split_off(0))
+    }
+}
+
+impl<'a> NodeVisitor for NodeVisitorTestImpl<'a> {
+    fn visit_token(&mut self, token: ParseToken) {
+        self.stack.push(token);
+    }
+}
+
+fn setup() {
+    let _ = env_logger::try_init();
+}
+
+fn run(input: &str) -> result::Result<Vec<ParseToken>, String> {
+    let mut interpreter = NodeVisitorTestImpl::new(input);
+    interpreter.visit()
+}
+
+#[test]
+fn parse_path() {
+    setup();
+
+    assert_eq!(run("$.aa"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::In,
+        ParseToken::Key("aa".to_owned())
+    ]));
+
+    assert_eq!(run("$.00.a"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::In,
+        ParseToken::Key("00".to_owned()),
+        ParseToken::In,
+        ParseToken::Key("a".to_owned())
+    ]));
+
+    assert_eq!(run("$.00.韓창.seok"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::In,
+        ParseToken::Key("00".to_owned()),
+        ParseToken::In,
+        ParseToken::Key("韓창".to_owned()),
+        ParseToken::In,
+        ParseToken::Key("seok".to_owned())
+    ]));
+
+    assert_eq!(run("$.*"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::In,
+        ParseToken::All
+    ]));
+
+    assert_eq!(run("$..*"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Leaves,
+        ParseToken::All
+    ]));
+
+    assert_eq!(run("$..[0]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Leaves,
+        ParseToken::Array,
+        ParseToken::Number(0.0),
+        ParseToken::ArrayEof
+    ]));
+
+    match run("$.") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$..") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$. a") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+}
+
+#[test]
+fn parse_array_sytax() {
+    setup();
+
+    assert_eq!(run("$.book[?(@.isbn)]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::In,
+        ParseToken::Key("book".to_string()),
+        ParseToken::Array,
+        ParseToken::Relative,
+        ParseToken::In,
+        ParseToken::Key("isbn".to_string()),
+        ParseToken::ArrayEof
+    ]));
+
+    //
+    // Array도 컨텍스트 In으로 간주 할거라서 중첩되면 하나만
+    //
+    assert_eq!(run("$.[*]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::All,
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[*]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::All,
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[*].가"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::All,
+        ParseToken::ArrayEof,
+        ParseToken::In, ParseToken::Key("가".to_owned())
+    ]));
+
+    assert_eq!(run("$.a[0][1]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Number(0_f64),
+        ParseToken::ArrayEof,
+        ParseToken::Array,
+        ParseToken::Number(1_f64),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[1,2]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Union(vec![1, 2]),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[10:]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Range(Some(10), None),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[:11]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Range(None, Some(11)),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[-12:13]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Range(Some(-12), Some(13)),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[?(1>2)]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Number(1_f64), ParseToken::Number(2_f64), ParseToken::Filter(FilterToken::Greater),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$.a[?($.b>3)]"), Ok(vec![
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Array,
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("b".to_owned()), ParseToken::Number(3_f64), ParseToken::Filter(FilterToken::Greater),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$[?($.c>@.d && 1==2)]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("c".to_owned()),
+        ParseToken::Relative, ParseToken::In, ParseToken::Key("d".to_owned()),
+        ParseToken::Filter(FilterToken::Greater),
+        ParseToken::Number(1_f64), ParseToken::Number(2_f64), ParseToken::Filter(FilterToken::Equal),
+        ParseToken::Filter(FilterToken::And),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$[?($.c>@.d&&(1==2||3>=4))]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::Absolute, ParseToken::In, ParseToken::Key("c".to_owned()),
+        ParseToken::Relative, ParseToken::In, ParseToken::Key("d".to_owned()),
+        ParseToken::Filter(FilterToken::Greater),
+        ParseToken::Number(1_f64), ParseToken::Number(2_f64), ParseToken::Filter(FilterToken::Equal),
+        ParseToken::Number(3_f64), ParseToken::Number(4_f64), ParseToken::Filter(FilterToken::GreaterOrEqual),
+        ParseToken::Filter(FilterToken::Or),
+        ParseToken::Filter(FilterToken::And),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$[?(@.a<@.b)]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::Relative, ParseToken::In, ParseToken::Key("a".to_owned()),
+        ParseToken::Relative, ParseToken::In, ParseToken::Key("b".to_owned()),
+        ParseToken::Filter(FilterToken::Little),
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$[*][*][*]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::All,
+        ParseToken::ArrayEof,
+        ParseToken::Array,
+        ParseToken::All,
+        ParseToken::ArrayEof,
+        ParseToken::Array,
+        ParseToken::All,
+        ParseToken::ArrayEof
+    ]));
+
+    assert_eq!(run("$['a']['bb']"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::Key("a".to_string()),
+        ParseToken::ArrayEof,
+        ParseToken::Array,
+        ParseToken::Key("bb".to_string()),
+        ParseToken::ArrayEof
+    ]));
+
+    match run("$[") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[a]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[?($.a)]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[?(@.a > @.b]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[?(@.a < @.b&&(@.c < @.d)]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+}
+
+#[test]
+fn parse_array_float() {
+    setup();
+
+    assert_eq!(run("$[?(1.1<2.1)]"), Ok(vec![
+        ParseToken::Absolute,
+        ParseToken::Array,
+        ParseToken::Number(1.1), ParseToken::Number(2.1), ParseToken::Filter(FilterToken::Little),
+        ParseToken::ArrayEof
+    ]));
+
+    match run("$[1.1]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[?(1.1<.2)]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[?(1.1<2.)]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+
+    match run("$[?(1.1<2.a)]") {
+        Ok(_) => panic!(),
+        _ => {}
+    }
+}
\ No newline at end of file
diff --git a/tests/tokenizer.rs b/tests/tokenizer.rs
new file mode 100644
index 0000000..1e83c84
--- /dev/null
+++ b/tests/tokenizer.rs
@@ -0,0 +1,194 @@
+extern crate jsonpath_lib as jsonpath;
+
+use jsonpath::prelude::*;
+
+fn collect_token(input: &str) -> (Vec<Token>, Option<TokenError>) {
+    let mut tokenizer = Tokenizer::new(input);
+    let mut vec = vec![];
+    loop {
+        match tokenizer.next_token() {
+            Ok(t) => vec.push(t),
+            Err(e) => return (vec, Some(e)),
+        }
+    }
+}
+
+fn run(input: &str, expected: (Vec<Token>, Option<TokenError>)) {
+    let (vec, err) = collect_token(input.clone());
+    assert_eq!((vec, err), expected, "\"{}\"", input);
+}
+
+#[test]
+fn peek() {
+    let mut tokenizer = PreloadedTokenizer::new("$.a");
+    match tokenizer.next_token() {
+        Ok(t) => assert_eq!(Token::Absolute(0), t),
+        _ => panic!()
+    }
+
+    match tokenizer.peek_token() {
+        Ok(t) => assert_eq!(&Token::Dot(1), t),
+        _ => panic!()
+    }
+
+    match tokenizer.peek_token() {
+        Ok(t) => assert_eq!(&Token::Dot(1), t),
+        _ => panic!()
+    }
+
+    match tokenizer.next_token() {
+        Ok(t) => assert_eq!(Token::Dot(1), t),
+        _ => panic!()
+    }
+}
+
+#[test]
+fn token() {
+    run("$.01.a",
+        (
+            vec![
+                Token::Absolute(0),
+                Token::Dot(1),
+                Token::Key(2, "01".to_string()),
+                Token::Dot(4),
+                Token::Key(5, "a".to_string())
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("$.   []",
+        (
+            vec![
+                Token::Absolute(0),
+                Token::Dot(1),
+                Token::Whitespace(2, 2),
+                Token::OpenArray(5),
+                Token::CloseArray(6)
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("$..",
+        (
+            vec![
+                Token::Absolute(0),
+                Token::Dot(1),
+                Token::Dot(2),
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("$..ab",
+        (
+            vec![
+                Token::Absolute(0),
+                Token::Dot(1),
+                Token::Dot(2),
+                Token::Key(3, "ab".to_string())
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("$..가 [",
+        (
+            vec![
+                Token::Absolute(0),
+                Token::Dot(1),
+                Token::Dot(2),
+                Token::Key(3, "가".to_string()),
+                Token::Whitespace(6, 0),
+                Token::OpenArray(7),
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("[-1, 2 ]",
+        (
+            vec![
+                Token::OpenArray(0),
+                Token::Key(1, "-1".to_string()),
+                Token::Comma(3),
+                Token::Whitespace(4, 0),
+                Token::Key(5, "2".to_string()),
+                Token::Whitespace(6, 0),
+                Token::CloseArray(7),
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("[ 1 2 , 3 \"abc\" : -10 ]",
+        (
+            vec![
+                Token::OpenArray(0),
+                Token::Whitespace(1, 0),
+                Token::Key(2, "1".to_string()),
+                Token::Whitespace(3, 0),
+                Token::Key(4, "2".to_string()),
+                Token::Whitespace(5, 0),
+                Token::Comma(6),
+                Token::Whitespace(7, 0),
+                Token::Key(8, "3".to_string()),
+                Token::Whitespace(9, 0),
+                Token::DoubleQuoted(10, "abc".to_string()),
+                Token::Whitespace(15, 0),
+                Token::Split(16),
+                Token::Whitespace(17, 0),
+                Token::Key(18, "-10".to_string()),
+                Token::Whitespace(21, 0),
+                Token::CloseArray(22),
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("?(@.a가 <41.01)",
+        (
+            vec![
+                Token::Question(0),
+                Token::OpenParenthesis(1),
+                Token::At(2),
+                Token::Dot(3),
+                Token::Key(4, "a가".to_string()),
+                Token::Whitespace(8, 0),
+                Token::Little(9),
+                Token::Key(10, "41".to_string()),
+                Token::Dot(12),
+                Token::Key(13, "01".to_string()),
+                Token::CloseParenthesis(15),
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("?(@.a <4a.01)",
+        (
+            vec![
+                Token::Question(0),
+                Token::OpenParenthesis(1),
+                Token::At(2),
+                Token::Dot(3),
+                Token::Key(4, "a".to_string()),
+                Token::Whitespace(5, 0),
+                Token::Little(6),
+                Token::Key(7, "4a".to_string()),
+                Token::Dot(9),
+                Token::Key(10, "01".to_string()),
+                Token::CloseParenthesis(12),
+            ]
+            , Some(TokenError::Eof)
+        ));
+
+    run("?($.c>@.d)", (
+        vec![
+            Token::Question(0),
+            Token::OpenParenthesis(1),
+            Token::Absolute(2),
+            Token::Dot(3),
+            Token::Key(4, "c".to_string()),
+            Token::Greater(5),
+            Token::At(6),
+            Token::Dot(7),
+            Token::Key(8, "d".to_string()),
+            Token::CloseParenthesis(9)
+        ]
+        , Some(TokenError::Eof)
+    ));
+}
\ No newline at end of file
diff --git a/wasm/Cargo.toml b/wasm/Cargo.toml
index 703770e..bfea118 100644
--- a/wasm/Cargo.toml
+++ b/wasm/Cargo.toml
@@ -2,11 +2,8 @@
 name = "jsonpath-wasm"
 version = "0.1.3"
 authors = ["Changseok Han <freestrings@gmail.com>"]
-
 description = "JsonPath Webassembly version compiled by Rust - Demo: https://freestrings.github.io/jsonpath"
-
 keywords = ["library", "jsonpath", "json", "webassembly"]
-
 repository = "https://github.com/freestrings/jsonpath"
 license = "MIT"
 
diff --git a/wasm/build.sh b/wasm/build.sh
deleted file mode 100755
index 791d4d5..0000000
--- a/wasm/build.sh
+++ /dev/null
@@ -1,79 +0,0 @@
-#!/bin/bash
-
-set -e
-
-# project_root/wasm
-DIR="$(pwd)"
-
-cd "${DIR}"/www && \
-    rm -rf "${DIR}"/www/dist && \
-    rm -rf "${DIR}"/www/node_modules && \
-    rm -rf "${DIR}"/www_bench/dist && \
-    rm -rf "${DIR}"/www_bench/node_modules && \
-    npm install && \
-    cd "${DIR}"
-
-echo "-------------------- start build nodejs pkg --------------------"
-echo
-
-rm -rf "${DIR}"/wasm/nodejs_pkg && \
-wasm-pack build --target=nodejs --scope nodejs --out-dir nodejs_pkg && \
-cd "${DIR}"/nodejs_pkg && npm link && \
-rm -rf "${DIR}"/../benches/javascript/node_modules && \
-cd "${DIR}"/../benches/javascript && npm install && \
-npm link @nodejs/jsonpath-wasm
-echo "-------------------- build nodejs pkg done --------------------"
-
-cd "${DIR}"
-
-echo
-echo
-echo
-echo
-echo
-echo
-echo "-------------------- start build browser pkg --------------------"
-echo
-rm -rf "${DIR}"/wasm/browser_pkg && \
-wasm-pack build --target=browser --scope browser --out-dir browser_pkg && \
-cd "${DIR}"/browser_pkg && npm link && \
-cd "${DIR}"/www && npm link @browser/jsonpath-wasm
-echo "-------------------- build browser pkg done --------------------"
-
-echo
-echo
-echo
-echo
-echo
-echo
-echo "-------------------- start build browser bench pkg --------------------"
-echo
-rm -rf "${DIR}"/www_bench/node_modules && \
-cd "${DIR}"/www_bench && npm install && npm link @browser/jsonpath-wasm
-echo "-------------------- build browser bench pkg done --------------------"
-
-echo
-echo
-echo
-echo
-echo
-echo
-echo "-------------------- start build docs --------------------"
-cd "${DIR}"/www && \
-    npm run build && \
-    rm -f "${DIR}"/../docs/*.js && rm -f "${DIR}"/../docs/*.wasm && rm -f "${DIR}"/../docs/*.html && \
-    cp "${DIR}"/www/dist/*.* "${DIR}"/../docs/
-echo "-------------------- build docs done --------------------"
-
-echo
-echo
-echo
-echo
-echo
-echo
-echo "-------------------- start build docs bench --------------------"
-cd "${DIR}"/www_bench && \
-    npm run build && \
-    rm -f "${DIR}"/../docs/bench/*.js && rm -f "${DIR}"/../docs/bench/*.wasm && rm -f "${DIR}"/../docs/bench/*.html && \
-    cp "${DIR}"/www_bench/dist/*.* "${DIR}"/../docs/bench/
-echo "-------------------- build docs bench done --------------------"
\ No newline at end of file
diff --git a/wasm/src/lib.rs b/wasm/src/lib.rs
index 4cddbee..a104dcf 100644
--- a/wasm/src/lib.rs
+++ b/wasm/src/lib.rs
@@ -11,9 +11,7 @@ use std::result::Result;
 use std::sync::Mutex;
 
 use cfg_if::cfg_if;
-use jsonpath::filter::value_filter::*;
-use jsonpath::parser::parser::*;
-use jsonpath::ref_value::*;
+use jsonpath::prelude::*;
 use serde_json::Value;
 use wasm_bindgen::prelude::*;
 use web_sys::console;
@@ -54,7 +52,7 @@ fn into_serde_json(js_value: &JsValue) -> Result<Value, String> {
 
 fn into_ref_value(js_value: &JsValue, node: Node) -> JsValue {
     match into_serde_json(js_value) {
-        Ok(json) => filter_ref_value(json.into(), node),
+        Ok(json) => filter_ref_value((&json).into(), node),
         Err(e) => JsValue::from_str(&format!("Json serialize error: {}", e))
     }
 }
@@ -87,7 +85,7 @@ pub fn alloc_json(js_value: JsValue) -> usize {
 
             let mut idx = CACHE_JSON_IDX.lock().unwrap();
             *idx += 1;
-            map.insert(*idx, json.into());
+            map.insert(*idx, (&json).into());
             *idx
         }
         Err(e) => {
@@ -138,7 +136,7 @@ pub fn selector(js_value: JsValue) -> JsValue {
         }
         _ => {
             match into_serde_json(&js_value) {
-                Ok(json) => json.into(),
+                Ok(json) => (&json).into(),
                 Err(e) => return JsValue::from_str(e.as_str())
             }
         }