Code created while working through "100 Go mistakes and how to avoid them" by Teiva Harsanyi.
feat: add no 39
+43
+40
no39/main_test.go
+40
no39/main_test.go
···
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package no39_test
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import (
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"strings"
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"testing"
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)
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func BenchmarkSliceConcatination(b *testing.B) {
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abc := "abcdefghijklmnopqrstuvwxyz"
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testcases := map[string]func(*testing.B){
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"simple concat": func(b *testing.B) {
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res := ""
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for _, rne := range abc {
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res += string(rne)
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}
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},
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"string builder": func(b *testing.B) {
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sb := strings.Builder{}
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for _, rne := range abc {
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_, _ = sb.WriteRune(rne)
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}
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_ = sb.String()
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},
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"string builder with pre-alloc": func(b *testing.B) {
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sb := strings.Builder{}
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sb.Grow(len(abc))
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for _, rne := range abc {
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_, _ = sb.WriteRune(rne)
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}
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_ = sb.String()
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},
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}
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for range b.N {
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for name, bfunc := range testcases {
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b.Run(name, bfunc)
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}
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}
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}