问题
I'm trying to find the best method of incode performance monitoring on the iPhone.
On a windows platform I would use the following functions :
QueryPerformanceCounter((LARGE_INTEGER *)&ctr);
QueryPerformanceFrequency((LARGE_INTEGER *)&freq);
Does anything like this exist on the iPhone? Whats the highest resolution I can time something without using an external tool such as Instruments or Shark?
回答1:
I think mach_absolute_time is what you are looking for. For more information:
- Technical Q&A QA1398: Mach Absolute Time Units
- Tutorial: Performance and Time
- mach_ absolute_ time on the iPhone
来源：https://stackoverflow.com/questions/634144/performance-counters-on-the-iphone