golang-switch-vs-map.go

package main

import "testing"

func belongsToMap(imei string) bool {
	list := map[string]bool{
		"990008982968575": true,
		"990008983020525": true,
		"990008982964921": true,
		"990008982968500": true,
		"990008982967031": true,
		"990008982966330": true,
		"990008982966132": true,
		"990008982966157": true,
		"990008982966207": true,
		"990008982966363": true,
	}
	if _, ok := list[imei]; ok {
		return true
	} else {
		return false
	}
}

func belongsToSwitch(imei string) bool {
	switch imei {
	case
		"990008982968575",
		"990008983020525",
		"990008982964921",
		"990008982968500",
		"990008982967031",
		"990008982966330",
		"990008982966132",
		"990008982966157",
		"990008982966207",
		"990008982966363":
		return true
	}
	return false
}

func Benchmark1(b *testing.B) {
	b.Run("Map", func(b *testing.B) {
		for i := 0; i < b.N; i++ {
			_ = belongsToMap("test-imei")
		}
	})

	b.Run("Switch", func(b *testing.B) {
		for i := 0; i < b.N; i++ {
			_ = belongsToSwitch("test-imei")
		}
	})
}