测量代码执行时间

我想知道一个过程/功能/命令需要花费多少时间来进行测试。


这是我所做的,但是我的方法是错误的,因为如果秒的差为0,则无法返回经过的毫秒数:


请注意,睡眠值是500毫秒,所以经过的秒数是0,那么它就不能返回毫秒。


    Dim Execution_Start As System.DateTime = System.DateTime.Now

    Threading.Thread.Sleep(500)


    Dim Execution_End As System.DateTime = System.DateTime.Now

    MsgBox(String.Format("H:{0} M:{1} S:{2} MS:{3}", _

    DateDiff(DateInterval.Hour, Execution_Start, Execution_End), _

    DateDiff(DateInterval.Minute, Execution_Start, Execution_End), _

    DateDiff(DateInterval.Second, Execution_Start, Execution_End), _

    DateDiff(DateInterval.Second, Execution_Start, Execution_End) * 60))

有人可以告诉我一种更好的方法吗?也许与TimeSpan?


解决方案:


Dim Execution_Start As New Stopwatch

Execution_Start.Start()


Threading.Thread.Sleep(500)


MessageBox.Show("H:" & Execution_Start.Elapsed.Hours & vbNewLine & _

       "M:" & Execution_Start.Elapsed.Minutes & vbNewLine & _

       "S:" & Execution_Start.Elapsed.Seconds & vbNewLine & _

       "MS:" & Execution_Start.Elapsed.Milliseconds & vbNewLine, _

       "Code execution time", MessageBoxButtons.OK, MessageBoxIcon.Information)


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3回答

慕妹3146593

更好的方法是使用Stopwatch而不是DateTime差异。秒表类-Microsoft Docs提供一组方法和属性,可用于准确测量经过的时间。Stopwatch stopwatch = Stopwatch.StartNew(); //creates and start the instance of Stopwatch//your sample codeSystem.Threading.Thread.Sleep(500);stopwatch.Stop();Console.WriteLine(stopwatch.ElapsedMilliseconds);

MMMHUHU

Stopwatch 测量经过的时间。// Create new stopwatchStopwatch stopwatch = new Stopwatch();// Begin timingstopwatch.Start();Threading.Thread.Sleep(500)// Stop timingstopwatch.Stop();Console.WriteLine("Time elapsed: {0}", stopwatch.Elapsed);这是一个DEMO。
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