Comparison of byte slices

main_test.go

package main

import (
	"bytes"
	"testing"
)

var d = make([]byte, 256)

func init() {
	for i, l := 0, len(d); i < l; i++ {
		d[i] = 0
	}
}

func loopEqual(a, b []byte) bool {
	al, bl := len(a), len(b)
	if al != bl {
		return false
	}
	for i := 0; i < al; i++ {
		if a[i] != b[i] {
			return false
		}
	}
	return true
}

func Benchmark_loop(b *testing.B) {
	for i := 0; i < b.N; i++ {
		loopEqual(d, d)
	}
}

func Benchmark_bytesEqual(b *testing.B) {
	for i := 0; i < b.N; i++ {
		bytes.Equal(d, d)
	}
}

result

$ go test -bench . -benchmem
testing: warning: no tests to run
PASS
Benchmark_loop	         10000000	         203 ns/op	       0 B/op	       0 allocs/op
Benchmark_bytesEqual	100000000	        11.0 ns/op	       0 B/op	       0 allocs/op
ok  	github.com/yosssi/comp_byte	3.358s