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Oct 26th, 2018, 05:03 PM
#20
Re: TimerEx, hi precision timer using QueryPerformanceCounter
Hi Couttsj,
According to Microsoft, QueryPerformanceCounter can have a resolution of up to ONE millisecond. And GetTickCount can get no better than about 10 milliseconds (or ONE centisecond). Also, GetTickCount supposedly wraps after 49.7 days. Whereas, from any reference I can find, I don't believe that QueryPerformanceCounter ever wraps.
Best Regards,
Elroy
EDIT1: With the understanding that a Double gives us 15 digits of base-10 precision, and that we need four for our microseconds, that leaves 11 digits for whole-seconds. So, we could count up to 99,999,999,999 seconds before we needed to wrap. That's over 3,000 years, so I don't think we need to worry about wrapping.
Last edited by Elroy; Oct 26th, 2018 at 05:14 PM.
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