canthide.go

package main

import (
  "fmt"
  "time"
)

func f() {
  messages := make(chan string)

	go func() {
		<- time.After(500)
		messages <- "ping"
	}()

	<- messages
}

func main() {
  for i := 0; i < 500000; i++ {
      go f()
  }

  fmt.Println("Done")
}