How to calculate the execution time of the program in windows application c#?

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I have a three algorithms implemented in c#, i want to compare these algorithm on the basis of the execution time, please give me the code that compare these algorithm in c# windows form?? an how can i compare it?? i really need it

Posted 21-Sep-14 2:55am

Member 11063279

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[no name] 21-Sep-14 9:06am

http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch(v=vs.110).aspx

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Manas Bhardwaj · Accepted Answer · 2014-09-21T03:06:00

Solution 1

You can use Stopwatch [^]for this. Something like this:

C#

var watch = Stopwatch.StartNew();
// the code that you want to measure comes here
watch.Stop();
var elapsedMs = watch.ElapsedMilliseconds;

Posted 21-Sep-14 3:06am

Manas Bhardwaj

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Member 11063279 21-Sep-14 9:12am

but this will give the zero result every time, please explain me ??

Manas Bhardwaj 21-Sep-14 9:14am

Did you replace the comment with the method call which you want measure?

Member 11063279 21-Sep-14 9:32am

yup i have changed but it gives the different answer , more ever for long string it's start giving short answer. is it giving answer in nano second??

Manas Bhardwaj 21-Sep-14 9:40am

In MilliSeconds. I think the property name itself is self explanatory.

Sergey Alexandrovich Kryukov 21-Sep-14 13:42pm

Real accuracy is better than that...
—SA

Member 11063279 21-Sep-14 19:35pm

what did you mean? please explain?

PIEBALDconsult 21-Sep-14 10:02am

You will likely need to execute the method many times (millions) to get a usable result.
Also, you need to ensure that the result of the execution is used or the compiler may optimize away the whole thing leaving you with a very short execution time.

Sergey Alexandrovich Kryukov 21-Sep-14 13:42pm

5ed — Stopwatch gives the most precised measure. To be used for optimization on a regular basis, a profiler should better be used.
—SA

Sergey Alexandrovich Kryukov · Accepted Answer · 2014-09-21T14:06:00

S A Kryukov wrote:
Real accuracy is better than that...
—SA

Member 11063279 asked:
what did you mean? please explain?

Please see:
http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.ishighresolution(v=vs.110).aspx[^],
http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.frequency(v=vs.110).aspx[^].

Call these two properties and you will see. Therefore, for a precise time, use double properties
http://msdn.microsoft.com/en-us/library/system.timespan.totalseconds(v=vs.110).aspx[^],
http://msdn.microsoft.com/en-us/library/system.timespan.totalminutes(v=vs.110).aspx[^],
http://msdn.microsoft.com/en-us/library/system.timespan.totalmilliseconds(v=vs.110).aspx[^],
http://msdn.microsoft.com/en-us/library/system.timespan.totalhours(v=vs.110).aspx[^],
http://msdn.microsoft.com/en-us/library/system.timespan.totaldays(v=vs.110).aspx[^], to get proper fractional value with appropriate accuracy, instead of int properties Seconds, Milliseconds, etc., with their rounding errors.

—SA