Philippe Vaucher wrote:
microsec_clock doens't use timeGetTime()... it uses GetSystemTime() if I remember correctly.
I haven't tried it but according to various links, GetSystemTime() only gives ~10ms or ~15ms precision (eg. http://discuss.fogcreek.com/joelonsoftware3/default.asp?cmd=show&ixPost=85520). After Googling, I found this old but useful article on timers: http://www.ddj.com/dept/windows/184416651 In particular, this table summarizes the resolution: http://www.ddj.com/showArticle.jhtml?documentID=win0305a&pgno=17 Maybe GetSystemTime() should be renamed "centisec_timer" :) My personal vote would for microsec_timer to be implemented based on QueryPerformanceCounter() and just make sure we point to the MSDN documentation. Regards, -Edward