Re: QueryPerformanceFrequency

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#12182

From: William Meyer
Date: Fri, 22 Nov 2002 22:39

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David J Taylor wrote:

> > For performance measures, though, RDTSC is the better thing to use.
> 
> Why?

Resolution. RDTSC is sampling a CPU register that is incremented at CPU 
clock rate. In one second, on my 1.33GHz Athlon, the value increments 
by roughly 1,330,000,000.

If you're timing a small piece of code that will execute many times, 
then finer resolution is appropriate.

-- 
Bill
A society of sheep must in time beget a government of wolves.
- Bertrand de Juvenal
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From: "William Meyer" <bill_meyer@earthlink.net>
Subject: Re: QueryPerformanceFrequency
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