first commit lua ffi

benchmark/benches_lua_vs_rust/.gitignore

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+.idea/*
+.vscode
+/target/
+Cargo.lock

benchmark/benches_lua_vs_rust/Cargo.toml

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+[package]
+name = "lua_vs_rust_benchmark"
+version = "0.1.0"
+authors = ["Changseok Han <freestrings@gmail.com>"]
+license = "MIT"
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = { version = "1.0", features = ["preserve_order"] }
+jsonpath_lib = { path = "../../" }
+
+[[bin]]
+name = "lua_vs_rust_benchmark"
+path = "example.rs"

benchmark/benches_lua_vs_rust/bench_lua_vs_rust.sh

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+#!/bin/bash
+
+set -e
+
+# http://luajit.org/index.html
+
+cargo clean && \
+cargo build --release
+
+export JSONPATH_LIB_PATH="${PWD}/../../target/release"
+export LUA_PATH="${PWD}/../../lua/?.lua;"
+
+echo
+time cargo run --release -- 1000
+echo
+time luajit example.lua 1000
+echo
+time cargo run --release -- 5000
+echo
+time luajit example.lua 5000
+echo
+time cargo run --release -- 10000
+echo
+time luajit example.lua 10000
+

benchmark/benches_lua_vs_rust/example.lua

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+require("lib")
+
+local iter;
+if arg[1] == nil or arg[1] == '' then
+    iter = 5000;
+else
+    iter = tonumber(arg[1]);
+end
+
+print(string.format("%s - %u", "lua iter", iter));
+
+local file = io.open("../../benchmark/example.json", "r");
+io.input(file)
+local data = io.read("*a");
+io.close(file);
+local cb = compile("$..book[?(@.price<30 && @.category==\"fiction\")]");
+for i = 0, iter do
+    local r = cb(data);
+--    print(r);
+end

benchmark/benches_lua_vs_rust/example.rs

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+extern crate jsonpath_lib as jsonpath;
+extern crate serde;
+extern crate serde_json;
+
+use std::io::Read;
+
+use serde_json::Value;
+
+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
+}
+
+fn get_string() -> String {
+    read_json("../../benchmark/example.json")
+}
+
+fn get_json() -> Value {
+    let string = get_string();
+    serde_json::from_str(string.as_str()).unwrap()
+}
+
+fn get_path() -> &'static str {
+    r#"$..book[?(@.price<30 && @.category=="fiction")]"#
+}
+
+fn main() {
+    let args: Vec<String> = std::env::args().collect();
+    let iter = if args.len() < 2 { 5000_usize } else { args[1].as_str().parse::<usize>().unwrap() };
+
+    println!("rust iter - {}", iter);
+
+    let json = get_json();
+    for _ in 0..iter {
+        let mut selector = jsonpath::Selector::default();
+        let _ = selector.str_path(get_path());
+        selector.value(&json);
+        let r = selector.select();
+        if r.is_err() {
+            panic!();
+        }
+//        println!("{:?}", serde_json::to_string(&r.expect("")).unwrap());
+    }
+}