Measuring code execution time

Question

I want to know how much time a procedure function order takes to finish  for testing purposes   This is what I did but my method is wrong  cause if the difference of seconds is 0 can t return the elapsed milliseconds   Notice the sleep value is 500 ms so elapsed seconds is 0 then it can t return milliseconds       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     Can someone show me a better way to do this  Maybe with a TimeSpan   The solution   Dim Execution Start As New Stopwatch Execution Start Start    Threading Thread Sleep 500   MessageBox Show  H    amp  Execution Start Elapsed Hours  amp  vbNewLine  amp            M    amp  Execution Start Elapsed Minutes  amp  vbNewLine  amp            S    amp  Execution Start Elapsed Seconds  amp  vbNewLine  amp            MS    amp  Execution Start Elapsed Milliseconds  amp  vbNewLine            Code execution time   MessageBoxButtons OK  MessageBoxIcon Information

User · Answer

If you are looking for the amount of time that the associated thread has spent running code inside the application.
You can use ProcessThread.UserProcessorTime Property which you can get under System.Diagnostics namespace.

TimeSpan startTime= Process.GetCurrentProcess().Threads[i].UserProcessorTime; // i being your thread number, make it 0 for main
//Write your function here
TimeSpan duration = Process.GetCurrentProcess().Threads[i].UserProcessorTime.Subtract(startTime);

Console.WriteLine($"Time caluclated by CurrentProcess method: {duration.TotalSeconds}"); // This syntax works only with C# 6.0 and above

Note: If you are using multi threads, you can calculate the time of each thread individually and sum it up for calculating the total duration.

User · Answer

Example for how one might use the Stopwatch class in VB NET  Dim Stopwatch As New Stopwatch  Stopwatch Start                    Test Code Stopwatch Stop   Console WriteLine Stopwatch Elapsed ToString   Stopwatch Restart                               Test Again  Stopwatch Stop   Console WriteLine Stopwatch Elapsed ToString

User · Answer

Stopwatch measures time elapsed       Create new stopwatch Stopwatch stopwatch   new Stopwatch        Begin timing stopwatch Start     Threading Thread Sleep 500      Stop timing stopwatch Stop     Console WriteLine  Time elapsed   0    stopwatch Elapsed     Here is a DEMO

User · Answer

Stopwatch is designed for this purpose and is one of the best way to measure execution time in  NET  var watch   System Diagnostics Stopwatch StartNew       the code that you want to measure comes here    watch Stop    var elapsedMs   watch ElapsedMilliseconds   Do not use DateTimes to measure execution time in  NET

User · Answer

A better way would be to use Stopwatch  instead of DateTime differences    Stopwatch Class - Microsoft Docs     Provides a set of methods and properties that you can use to   accurately measure elapsed time    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

User · Answer

If you use the Stopwatch class  you can use the  StartNew   method to reset the watch to 0  So you don t have to call  Reset   followed by  Start    Might come in handy

User · Answer

You can use this Stopwatch wrapper   public class Benchmark   IDisposable        private readonly Stopwatch timer   new Stopwatch        private readonly string benchmarkName       public Benchmark string benchmarkName                this benchmarkName   benchmarkName          timer Start               public void Dispose                  timer Stop            Console WriteLine    benchmarkName   timer Elapsed               Usage   using  var bench   new Benchmark   Insert  n  records               your code here     Output   Insert 10 records  00 00 00 0617594   For advanced scenarios  you can use BenchmarkDotNet or Benchmark It or NBench

[c#] Measuring code execution time

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