reflection2_9.go

func AddSlowly(a, b int) int {
	time.Sleep(100 * time.Millisecond)
	return a + b
}

func main() {
	ch, err := Cacher(AddSlowly, 2*time.Second)
	if err != nil {
		panic(err)
	}
	chAddSlowly := ch.(func(int, int) int)
	for i := 0; i < 5; i++ {
		start := time.Now()
		result := chAddSlowly(1, 2)
		end := time.Now()
		fmt.Println("got result", result, "in", end.Sub(start))
	}
	time.Sleep(3 * time.Second)
	start := time.Now()
	result := chAddSlowly(1, 2)
	end := time.Now()
	fmt.Println("got result", result, "in", end.Sub(start))
}