Obj-C simple benchmarking

// - MARK: - Swift

let startTime = CACurrentMediaTime()
// Code to test
print("Runtime: \((CACurrentMediaTime() - startTime) * 1000) ms")

// MARK: - Obj-C

// Measuring runtime of the particular part of code
CFTimeInterval startTime = CACurrentMediaTime();
// Code to test
NSLog(@"Runtime: %g ms", (CACurrentMediaTime() - startTime) * 1000);

// Measuring average runtime of isolated part of code
extern uint64_t dispatch_benchmark(size_t count, void (^block)(void));
uint64_t t = dispatch_benchmark(iterations, ^{
    @autoreleasepool {
        // Code to test
    }
});
NSLog(@"Average Runtime: %llu ns", t);