From 5bf77960047966936f96eb0257ec61a2de2ff153 Mon Sep 17 00:00:00 2001
From: Jae Kwon <jae@tendermint.com>
Date: Sun, 20 Dec 2015 11:37:54 -0800
Subject: [PATCH] Add synchronous file write benchmark

---
 benchmarks/os_test.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 benchmarks/os_test.go

diff --git a/benchmarks/os_test.go b/benchmarks/os_test.go
new file mode 100644
index 00000000..49a160cd
--- /dev/null
+++ b/benchmarks/os_test.go
@@ -0,0 +1,29 @@
+package benchmarks
+
+import (
+	"os"
+	"testing"
+
+	. "github.com/tendermint/go-common"
+)
+
+func BenchmarkFileWrite(b *testing.B) {
+	b.StopTimer()
+	file, err := os.OpenFile("benchmark_file_write.out",
+		os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
+	if err != nil {
+		b.Error(err)
+	}
+	testString := RandStr(200) + "\n"
+	b.StartTimer()
+
+	for i := 0; i < b.N; i++ {
+		file.Write([]byte(testString))
+	}
+
+	file.Close()
+	err = os.Remove("benchmark_file_write.out")
+	if err != nil {
+		b.Error(err)
+	}
+}