go time模块

package main

import (
   "fmt"
   "time"
)

func test() {
   time.Sleep(time.Millisecond * 100)
}

func main() {

   now := time.Now()
   fmt.Println(now.Format("2006/01/02 15:04:05"))

   start := time.Now().UnixNano()
   test()
   end := time.Now().UnixNano()

   fmt.Printf("cost:%d \n", (end-start)/1000)
}