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Log time needed for process

Posted on 2000-04-14
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Last Modified: 2010-04-02
Hi,

Using Borland cpp Builder 4.x

I want to log the time needed for a certain process.

I tried :

SYSTEMTIME Time ;
GetSystemTime(&Time) ;
DWORD Seconds = (Time.wSecond + (Time.wMinute * 60) + (Time.wHour * 60 * 60))

Further down the code, after the process is finished I do this again and see what the difference is.

The question.
Is there an alternative and maybe faster way ??
Faster in the sense : more accurate ?

Is the above mentioned method effecient enough or is it system dependant and time consoming to get that time ??

Input is welcome.

sneeuw
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Question by:sneeuw
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Author Comment

by:sneeuw
ID: 2717873
typo :
consoming = consuming
;-)
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Accepted Solution

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chensu earned 50 total points
ID: 2718094
You may use the GetTickCount or timeGetTime functions. timeGetTime is more accurate.

"Windows NT/2000: The default precision of the timeGetTime function can be five milliseconds or more, depending on the machine. You can use the timeBeginPeriod and timeEndPeriod functions to increase the precision of timeGetTime. If you do so, the minimum difference between successive values returned by timeGetTime can be as large as the minimum period value set using timeBeginPeriod and timeEndPeriod. Use the QueryPerformanceCounter and QueryPerformanceFrequency functions to measure short time intervals at a high resolution,

Windows 95: The default precision of the timeGetTime function is 1 millisecond. In other words, the timeGetTime function can return successive values that differ by just 1 millisecond. This is true no matter what calls have been made to the timeBeginPeriod and timeEndPeriod functions."

See the following article for how to use the QueryPerformanceCounter function.

Win32 Multithreading Performance
http://msdn.microsoft.com/isapi/msdnlib.idc?theURL=/library/techart/msdn_threadli.htm
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Author Comment

by:sneeuw
ID: 2727228
Seems to work OK.
Thanks !

sneeuw
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