gistfile1.txt

package main

import (
	"bytes"
	"log"
	"net/http"
	"sync"
	"time"
)

func main() {
	for {
		const N = 500

		start := time.Now()

		var wg sync.WaitGroup
		wg.Add(N)

		for i := 0; i < N; i++ {
			// id := i
			go func() {
				// log.Printf("Sending %d\n", id)

				_, err := http.Post(
					"https://us-central1-whimsical-wombat.cloudfunctions.net/adder",
					"application/json",
					bytes.NewBuffer([]byte(`{"lhs":5,"rhs":5}`)),
				)

				// log.Printf("Received %d\n", id)

				if err != nil {
					log.Fatal(err)
				}

				wg.Done()
			}()
		}

		wg.Wait()

		log.Printf("%d took %v, sleeping\n", N, time.Now().Sub(start))

		time.Sleep(500*time.Millisecond)
	}
}