Golang example for compress file with LZ4

lz4_example.go

package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"runtime"
	"time"

	"github.com/pierrec/lz4"
)

func init() {
	runtime.GOMAXPROCS(runtime.NumCPU())
}

func main() {
	start := time.Now()
	err := compressLZ4(os.Args[1])
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("LZ4 time is: %v\n", time.Since(start))
}

func compressLZ4(filename string) error {
	data, err := ioutil.ReadFile(filename)
	if err != nil {
		log.Fatal(err)
	}
	var buff bytes.Buffer
	w := lz4.NewWriter(&buff)
	w.Write(data)
	w.Close()
	if err != nil {
		return err
	}
	return ioutil.WriteFile("/tmp/test.lz4", buff.Bytes(), 0644)
}