Benchmark finding a value in a slice

loop_test.go

package loop

import "testing"

func BenchmarkFor(b *testing.B) {
	for i := 0; i < b.N; i++ {
		lang := "de-de"
		supported := []string{"en-us", "ja-jp", "de-de"}
		found := false
		for _, s := range supported {
			if lang == s {
				found = true
			}
		}
		if !found {
			lang = "en-us"
		}
	}
}

func BenchmarkSwitch(b *testing.B) {
	for i := 0; i < b.N; i++ {
		lang := "de-de"
		found := false
		switch lang {
		case "en-us", "ja-jp", "de-de":
			found = true
		}
		if !found {
			lang = "en-us"
		}
	}
}

func BenchmarkMap(b *testing.B) {
	for i := 0; i < b.N; i++ {
		lang := "de-de"
		supported := map[string]interface{}{"en-us": nil, "ja-jp": nil, "de-de": nil}
		_, found := supported[lang]
		if !found {
			lang = "en-us"
		}
	}
}