iOS How To: Logging Time Intervals

It’s always nice to know how well a method in your app is performing. Well here’s a quick tip on timing said methods. The result will output how long a method took from start to finish down to the millisecond.

First add the following to your .h file:

NSDate *recordStart;

Next, in the method you wish to time, add the follow code:

recordStart = [NSDate date];
 
// The code you wish to time here
 
NSTimeInterval interval = [[NSDate date] timeIntervalSinceDate:recordStart];
NSLog(@"Stop Recording: %f", interval);