goroutine

main.go

package main

import (
 "fmt"
 "sync"
 "time"
)

func fakeWork(wg *sync.WaitGroup, id int) {
 defer wg.Done()
 time.Sleep(100 * time.Millisecond)
}

func main() {
 start := time.Now()
 var wg sync.WaitGroup

 wg.Add(10)
 for i := 0; i < 10; i++ {
  go fakeWork(&wg, i)
 }

 wg.Wait()
 fmt.Println("Go Concurrency Time:", time.Since(start))
}