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                函數time.Since() 計算golang運行的時間是非常有用的性能衡量指標,特別是在并發基準測試中。下面將介紹如何簡單地使用Go語言來計算程序運行的時間。 簡單地使用Golang的time.Since()函數即可。下面有一個完整例子展示這個用法。 ~~~ time.Hour 表示1小時 time.Minute 表示1分鐘 time.Second 表示1秒 time.Millisecond 表示1毫秒 time.Microsecond 表示1微妙 time.Nanosecond 表示1納秒 // 休眠5秒 time.Sleep(5 * time.Second) ~~~ ~~~ package main import ( "fmt" "time" ) func StartCac() { t1 := time.Now() for i := 0; i < 10000; i++ { time.Sleep(2*time.Nanosecond) //休眠2納秒 // continue } elapsed := time.Since(t1) fmt.Println("App elapsed: ", elapsed) } func main(){ StartCac() } ~~~ 輸出結果: ~~~ App elapsed: 4.031139ms ~~~
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