TChessBrd sample progam consume 99% of CPU time

Posted on 2004-04-01
Last Modified: 2010-04-16
I have downloaded a TChessBrd component from After installation and running sample program I found that it uses 99% of CPU time. The question is:

     How and what methodologies should I use to check that what is the problem in this program or component?

I am running a program on WinXP SP1 and Delphi6 (all patch updated).

Question by:soapsiam
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LVL 11

Expert Comment

ID: 10740355
Is it the CPU useusge at its max only when the Chessboard component is doing its search for next best move?

LVL 26

Accepted Solution

Russell Libby earned 125 total points
ID: 10741070

No, its always pegged due to the way the component is written. (done some testing with it). A quick and dirty on this, without picking it apart

// The execution point of the thread
procedure TChessThread.Execute;
        Sleep(100); // <-- Add this to the original code
        if ((ComputerPlaysWhite^)and(WhiteToMove^))or
           ((ComputerPlaysBlack^)and(WhiteToMove^=FALSE)) then


Expert Comment

ID: 10742692
rllibby is right. When the Execute method of a thread loops, you gotta have a call to Sleep in it, or it will eat up the CPU.

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