Benchmarking SplitByte implementations from https://gist.github.com/2821937, the proper way

split_test.go

package split

import "testing"

var long []byte

const sz = 24
const runs = 32

func init() {
	long = make([]byte, 1 << sz)
	for i := uint(0); i < sz-1; i++ {
		long[1 << i] = 'X'
	}
	BenchmarkSplit1(nil) // warm things up
	BenchmarkSplit2(nil)
	BenchmarkSplit3(nil)
}

func BenchmarkSplit1(*testing.B) {
	var data [][]byte
	for j := 0 ; j < runs ; j++ {
		data = SplitByte1(long, 'X')
	}
	if len(data) != sz { panic("incorrect") }
}

func BenchmarkSplit2(*testing.B) {
	var data [][]byte
	for j := 0 ; j < runs ; j++ {
		data = SplitByte2(long, 'X')
	}
	if len(data) != sz { panic("incorrect") }
}

func BenchmarkSplit3(*testing.B) {
	var data [][]byte
	for j := 0 ; j < runs ; j++ {
		data = SplitByte3(long, 'X')
	}
	if len(data) != sz { panic("incorrect") }
}

func TestSplit1(*testing.T) {
	data1 := SplitByte1(long, 'X')
	data2 := SplitByte2(long, 'X')
	if len(data1) != len(data2) {
		panic("not the same length")
	}
	for t := range data1 {
		if len(data1[t]) != len(data2[t]) { panic("disagree") }
		print(len(data1[t]), " ")
	}
}