go hash benchmark

main_test.go

package main

import (
	"crypto/md5"
	"crypto/sha1"
	"crypto/sha256"
	"fmt"
	"hash/crc32"
	"testing"
)

var pathIn = []byte("/foo/12/345")
var pathOut string

func BenchmarkCRC32(b *testing.B) {
	for i := 0; i < b.N; i++ {
		pathOut = string(pathIn) + "-" + string(crc32.ChecksumIEEE(pathIn))
	}
}

func BenchmarkMD5(b *testing.B) {
	for i := 0; i < b.N; i++ {
		pathOut = string(pathIn) + "-" + fmt.Sprintf("%x", md5.Sum(pathIn))
	}
}

func BenchmarkSHA1(b *testing.B) {
	for i := 0; i < b.N; i++ {
		pathOut = string(pathIn) + "-" + fmt.Sprintf("%x", sha1.Sum(pathIn))
	}
}

func BenchmarkSHA224(b *testing.B) {
	for i := 0; i < b.N; i++ {
		pathOut = string(pathIn) + "-" + fmt.Sprintf("%x", sha256.Sum224(pathIn))
	}
}

func BenchmarkSHA256(b *testing.B) {
	for i := 0; i < b.N; i++ {
		pathOut = string(pathIn) + "-" + fmt.Sprintf("%x", sha256.Sum256(pathIn))
	}
}

output

# go test -v -bench=. ./
testing: warning: no tests to run
PASS
BenchmarkCRC32	 5000000	       281 ns/op
BenchmarkMD5	 1000000	      2021 ns/op
BenchmarkSHA1	 1000000	      2383 ns/op
BenchmarkSHA224	  500000	      3264 ns/op
BenchmarkSHA256	  500000	      3292 ns/op
ok  	tmp/n61	10.466s