Re: [boost] Re: [date_time] enabling microsec_clock under C++Builder

From: Beman Dawes (bdawes_at_[hidden])
Date: 2003-03-24 10:12:58

Russell Hind wrote:

 >Does this help?
 >
 >I've just run this quickly on my PIII 800 running Win2K SP3 and worse
 >case for 1,000,000 calls to QueryPerformanceCounter was 1.92seconds,
 >usually between 1.55 and 1.65 seconds  (10 runs).
 >
 >LARGE_INTEGER Start, End, Temp;
 >     QueryPerformanceCounter(&Start);
 >     for (unsigned int i = 0; i < 1000000; ++i)
 >     {
 >         QueryPerformanceCounter(&Temp);
 >     }
 >     QueryPerformanceCounter(&End);
 >
 >LARGE_INTEGER Frequency;
 >     QueryPerformanceFrequency(&Frequency);
 >
 >double Time = (static_cast<double>(End.QuadPart) - Start.QuadPart) /
 >Frequency.QuadPart;
 >
 >Doesn't seem to bad to me.  Can't test on any more OSes as this is all
 >we have installed.

Interesting. Could you please post the entire program as an attachment, so 
I can just compile and run it without any cut-and-paste?

Thanks,

--Beman