Go Rate-limit Example

rate.go

package main

import (
	"context"
	"fmt"
	"time"

	"golang.org/x/time/rate"
)

func main() {
	limit := rate.Every(time.Second / 5)
	limiter := rate.NewLimiter(limit, 5)

	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
	defer cancel()

	for i := 0; i < 15; i++ {
		if err := limiter.Wait(ctx); err != nil {
			fmt.Println("ran out of time!")
			break
		}

		fmt.Println(i, "work!")
	}
}