QueryPerformanceCounter() equivalent on Mac OS X

Timer is quite an issue to some people who need to process image in realtime or who want to measure very fast code.

Because the QueryPerformanceCounter() and QueryPerformanceFrequency() are discussed in my previous post, one will raise a question, “Is there a similar function for the Mac OS X?”.

Yeah.. Actually, my blog stat showed that a few people searched with that term.

I found some functions like mach_absolute_time() and mach_timebase_info().

You can read very nice explanation here at the MacResearch and here at the Apple’s Q&A page.