小编典典

测量代码执行时间

c#

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?也许有一个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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2020-05-19

共1个答案

小编典典

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 code
System.Threading.Thread.Sleep(500);
stopwatch.Stop();
Console.WriteLine(stopwatch.ElapsedMilliseconds);
2020-05-19