package main

import "sync"
import "time"
import "fmt"

func main() {
	const reqs = 1000000
	var wg sync.WaitGroup
	start := time.Now()
	for idx := 0; idx < reqs; idx++ {
		wg.Add(1)
		go func() { wg.Done() }()
	}
	wg.Wait()
	stop := time.Now()
	timed := stop.Sub(start)
	fmt.Printf("%d goroutines in %s (%f per second)\n",
		reqs,
		timed,
		reqs/timed.Seconds())
}