NSDate* tmpStartData = [[NSDate date] retain];

 //You code here...

 double deltaTime = [[NSDate date] timeIntervalSinceDate:tmpStartData];

 NSLog(@">>>>>>>>>>cost time = %f ms", deltaTime*);

 #import <mach/mach_time.h>

 uint64_t start = mach_absolute_time();

 //You code here...

 uint64_t end = mach_absolute_time();

 uint64_t elapsed = end - start;mach_timebase_info_data_t info;

 if (mach_timebase_info (&info) != KERN_SUCCESS)

 {

     printf ("mach_timebase_info failed\n");

 }

 uint64_t nanosecs = elapsed * info.numer / info.denom;

 uint64_t millisecs = nanosecs / ;

 NSLog(@">>>>>>>>>>cost time = %ld ms", millisecs);