pure go compression benchmark

main_test.go

package main

import (
	"bytes"
	"compress/flate"
	"github.com/golang/snappy"
	"github.com/pierrec/lz4"
	"io"
	"io/ioutil"
	"testing"
)

const sourceFile = "linux-2.2.0.tar"

var source []byte

func init() {
	var err error
	source, err = ioutil.ReadFile(sourceFile)
	if err != nil {
		panic(err)
	}
}

func BenchmarkLZ4(b *testing.B) {
	w := lz4.NewWriter(ioutil.Discard)
	w.Write(source)
	w.Close()
}

func BenchmarkSnappy(b *testing.B) {
	w := snappy.NewWriter(ioutil.Discard)
	w.Write(source)
	w.Close()
}

func BenchmarkSnappy2(b *testing.B) {
	w := snappy.NewBufferedWriter(ioutil.Discard)
	w.Write(source)
	w.Close()
}

func BenchmarkLZ4_Reader(b *testing.B) {
	var buffer bytes.Buffer
	w := lz4.NewWriter(&buffer)
	w.Write(source)
	w.Close()
	b.ResetTimer()
	r := lz4.NewReader(&buffer)
	io.Copy(ioutil.Discard, r)
}

func BenchmarkSnappy_Reader(b *testing.B) {
	var buffer bytes.Buffer
	w := snappy.NewWriter(&buffer)
	w.Write(source)
	w.Close()
	b.ResetTimer()
	r := snappy.NewReader(&buffer)
	io.Copy(ioutil.Discard, r)
}

func BenchmarkFlate(b *testing.B) {
	w, _ := flate.NewWriter(ioutil.Discard, flate.DefaultCompression)
	w.Write(source)
	w.Close()
}

func BenchmarkFlate_Reader(b *testing.B) {
	var buffer bytes.Buffer
	w, _ := flate.NewWriter(&buffer, flate.DefaultCompression)
	w.Write(source)
	w.Close()
	b.ResetTimer()
	r := flate.NewReader(&buffer)
	io.Copy(ioutil.Discard, r)
}

result.txt

% go test -bench . -benchmem
goos: darwin
goarch: amd64
pkg: bench
BenchmarkLZ4-8             	2000000000	         0.14 ns/op	       0 B/op	       0 allocs/op
BenchmarkSnappy-8          	2000000000	         0.07 ns/op	       0 B/op	       0 allocs/op
BenchmarkSnappy2-8         	2000000000	         0.07 ns/op	       0 B/op	       0 allocs/op
BenchmarkLZ4_Reader-8      	2000000000	         0.07 ns/op	       0 B/op	       0 allocs/op
BenchmarkSnappy_Reader-8   	2000000000	         0.03 ns/op	       0 B/op	       0 allocs/op
BenchmarkFlate-8           	       1	2156897975 ns/op	  813696 B/op	      16 allocs/op
BenchmarkFlate_Reader-8    	2000000000	         0.17 ns/op	       0 B/op	       0 allocs/op
PASS
ok  	bench	54.229s