Profiling

[Bernd Storck]

I'm looking for hints, how I could realize something like profiling with a program coded in PB 3.2.

Any halp would be appreciated.

Regards Elek

[Lance Edmonds]

It's simple enough in concept... if you are talking about the way PB/CC and PB/Win provide profiling facilities.

In each Sub/Function, wrap the code like this:

SUB MySub()
  DIM X AS SINGLE
  X! = TIMER
  .
  . normal SUB code here
  .
  X! = TIMER - X!
  OPEN "Profile.txt" FOR APPEND AS #1
  WRITE #1, "MySub", X!
  CLOSE #1
END SUB

After running the program, you can open the disk file, and parse it, adding together all the times for subs/functions with the same names.

Naturally, you'd be best to profile a DOS app under plain MSDOS so the effects of multi-tasking do not skew the results too much.

If you take it one step further, you could write an app that takes the source code of an existing app and merges in the code (as shown above) into each Sub/Function in the program, and saves the file under a new name. This would make it much easier to profile existing programs without the need to manually copy/paste the code into each Sub/Function.

I hope this helps!

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Bernd Storck]

Ok, THX.
I will try it in such a way.

But if I'm not wrong, I must use MTIMER instead of TIMER.


Regards Elek

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[Lance Edmonds]

MTIMER has a resolution of approx 2 micro-seconds (µSec) and is accurate to periods of less than 54 milli-seconds (mSec). Any code that takes longer than 54 mSec should use TIMER instead.

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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Bernd Storck]

Ok, I will remember it.

Thanks.