Golang定时器的2种实现方法与区别

func foo() {
 fmt.Println("foo() start.")
 time.Sleep(time.Second * 3)
 fmt.Println("foo() end.")
}

func TestTicker(t *testing.T) {
 ticker := time.NewTicker(time.Second * 2)
 // 清理计时器
 defer ticker.Stop()
 for {
  fmt.Println("ticker start ", time.Now().Format("15:04:05"))
  foo()
  <-ticker.C
 }
}

func foo() {
 fmt.Println("foo() start.")
 time.Sleep(time.Second * 3)
 fmt.Println("foo() end.")
}

func TestTimer(t *testing.T) {
 timer := time.NewTimer(time.Second * 2)
 // 清理计时器
 defer timer.Stop()
 for {
  fmt.Println("ticker start ", time.Now().Format("15:04:05"))
  foo()
  <-timer.C
 }
}