iPhone dev Stupidity 68: Handcraft Profiler

Learned from here:

#include <mach/mach_time.h>

#define START_PROFILE(name)\

{\

const char * msg = name;\

mach_timebase_info_data_t info;\

mach_timebase_info(&info);\

uint64_t start = mach_absolute_time();

#define END_PROFILE\

uint64_t duration = mach_absolute_time() - start;\

duration *= info.numer;\

duration /= info.denom;\

NSLog(@"%s took %lld nanoseconds!", msg, duration);\

}

To use:

START_PROFILE("dude");

// some code here

// ...

END_PROFILE;