sliceint_test.go

package test

import (
	"testing"
)

var sum int

func sumByIndex(n int) (sum int) {
	sliceint := make([]int, n)

	for x := 0; x < n; x++ {
		sliceint[x] = x
	}

	for x := 0; x < n; x++ {
		sum += sliceint[x]
	}

	return sum
}

func sumByElm(n int) (sum int) {
	sliceint := make([]int, n)

	for x := 0; x < n; x++ {
		sliceint[x] = x
	}

	for _, el := range sliceint {
		sum += el
	}

	return sum
}

func BenchmarkSumByIndex10000(b *testing.B) {
	var s int
	for x := 0; x < b.N; x++ {
		s = sumByIndex(10000)
	}
	sum = s
	b.ReportAllocs()
}

func BenchmarkSumByElm10000(b *testing.B) {
	var s int
	for x := 0; x < b.N; x++ {
		s = sumByElm(10000)
	}
	sum = s
	b.ReportAllocs()
}

func BenchmarkSumByIndex1000000(b *testing.B) {
	var s int
	for x := 0; x < b.N; x++ {
		s = sumByIndex(1000000)
	}
	sum = s
	b.ReportAllocs()
}

func BenchmarkSumByElm1000000(b *testing.B) {
	var s int
	for x := 0; x < b.N; x++ {
		s = sumByElm(1000000)
	}
	sum = s
	b.ReportAllocs()
}