Rate Limit

ratelimit.go

package main

import (
	"context"
	"fmt"
	"time"

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

var limiter = rate.NewLimiter(rate.Every(1*time.Second), 1)

// PrintHello prints out the word hello
func PrintHello() {
	limiter.Wait(context.Background())
	fmt.Println("hello")
}

func main() {
	for i := 0; i < 10; i++ {
		PrintHello()
	}
}