CODEWITHSUNDEEP
c#performanceoptimization
Dena
Dena

Reputation: 43

algorithm performance c#

I want to measure the performance of my code.. if I consider the time as a criterion I have this code 

DateTime oldDate = new DateTime(2002,7,15);
DateTime newDate = DateTime.Now;
// Difference in days, hours, and minutes.
TimeSpan ts = newDate - oldDate;
// Difference in days.
int differenceInDays = ts.Milliseconds ;

Question1: is this the only way that I can test the performance of my algorithm ? Question2: what are other criterion that C# provide to test the performance? Regards

Upvotes: 1

Views: 413

Answers (5)

xanatos
xanatos

Reputation: 111940

If you truly want to use DateTime (because it's easier to use), use UtcNow instead of Now. It's a little faster (because current date and time are stored in UTC format in Windows) and as an added bonus, you can test your program around the DST change time :-).

But yeah, use Stopwatch. 

Stopwatch watch = Stopwatch.StartNew();
watch.Stop()

Ah... very important... your code is wrong

ts.TotalMilliseconds

I did the same error yesterday, but I was measuring times around the second, so it was more difficult to notice :-)

Upvotes: 2

jdehaan
jdehaan

Reputation: 19938

You can use a profiler (tool based, for example with SlimTune) or measure the time with System.Diagnostics.Stopwatch. It has better precision than the DateTime hack.

Upvotes: 2

santosh singh
santosh singh

Reputation: 28692

use Stopwatch class

//Start a stopwatch:

var watch = Stopwatch.StartNew();

//Execute the code

watch.Stop(); //This stops the watch

The elapsed time can be measured by using Elapsed, ElapsedMilliSeconds and ElapsedTicks properties.

Upvotes: 3

codeandcloud
codeandcloud

Reputation: 55298

Its always better to use System.Diagnostics.Stopwatch

Check this link for more details. Performance Tests: Precise Run Time Measurements with System.Diagnostics.Stopwatch

Upvotes: 3

Dave White
Dave White

Reputation: 3461

Try using the StopWatch class. It has significantly higher resolution than the DateTime and TimeSpan classes.

Additionally, you can look at the Windows Performance Counters as a way of measuring performance while your application is running so that you can monitor the health of your application.

Upvotes: 2

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