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80 lines
1.3 KiB
80 lines
1.3 KiB
package benchmark
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// from https://github.com/piersy/iterate-slice-bench-go
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// with fixes (methink)
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import (
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"testing"
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)
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var Val = uint64(42)
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var slice = make([]uint64, 500*500)
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func BenchmarkRangeReadSliceByIndex(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for j := range slice {
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Val = slice[j] + 1
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}
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}
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}
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func BenchmarkRangeReadSliceByValue(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for _, v := range slice {
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Val = v + 1
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}
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}
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}
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func BenchmarkRangeWriteSlice(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for j := range slice {
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slice[j] = Val + 1
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}
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}
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}
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func BenchmarkRangeReadAndWriteSlice(b *testing.B) {
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for i := 0; i < b.N; i++ {
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for j, v := range slice {
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slice[j] = v + 1
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}
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}
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}
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func BenchmarkForIterReadSlice(b *testing.B) {
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for i := 0; i < b.N; i++ {
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l := len(slice)
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for j := 0; j < l; j++ {
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Val = slice[j] + 1
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}
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}
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}
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func BenchmarkForIterWriteSlice(b *testing.B) {
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for i := 0; i < b.N; i++ {
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l := len(slice)
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for j := 0; j < l; j++ {
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slice[j] = Val + 1
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}
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}
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}
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func BenchmarkForIterReadAndWriteSlice(b *testing.B) {
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for i := 0; i < b.N; i++ {
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l := len(slice)
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for j := 0; j < l; j++ {
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slice[j] = slice[j] + 1
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}
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}
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}
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func BenchmarkDecreasingForIterReadAndWriteSlice(b *testing.B) {
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for i := 0; i < b.N; i++ {
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l := len(slice)
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for j := l - 1; j >= 0; j-- {
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slice[j] = slice[j] + 1
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}
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}
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}
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