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how to debug the app taking a long time to run?

Posted on 2011-10-10
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Hi,

I have this visual c# app doing some calculation and give out the output.
It used to take a few seconds not it is taking at least 20 min to finish.
The original author fixed a few things.

How can I debug and test it why it is taking so long?
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Question by:dkim18
6 Comments
 
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by:AndyAinscow
ID: 36942684
>>The original author fixed a few things.

Sounds like someone has written in a new bug - any documentation as to what 'fixes' were implemented?
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LVL 40
ID: 36943021
Without the code, it's hard to tell.

You might want to put a few lines like the following in the code and test the application in debug mode:
DateTime stepStart;

stepStart = DateTime.Now;
// First part of your calculation
Debug.WriteLine ( "Step 1 : " + DateTime.Now.Subtract ( stepStart ).TotalSeconds.ToString() );

stepStart = DateTime.Now;
// Second part of your calculation
Debug.WriteLine ( "Step 2 : " + DateTime.Now.Subtract ( stepStart ).TotalSeconds.ToString ( ) );

Open in new window

When the calculation is over, the Output window will indicate the time in seconds that you spent in each step of the calculation. That will help you to spot where you should look for the slowdown.
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by:Naman Goel
ID: 36943102
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Author Comment

by:dkim18
ID: 36943361
I forgto mention that I am vs 2010 ide.
Is there any tool I can use from VS?
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Naman Goel earned 1000 total points
ID: 36943885
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LVL 40

Assisted Solution

by:Jacques Bourgeois (James Burger)
Jacques Bourgeois (James Burger) earned 1000 total points
ID: 36944290
If you have the Premium edition of Visual Studio, you can use the performance tools under the Analyze menu.
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