With ARC, what's better: alloc or autorelease initializers?

Question

Is it better (faster & more efficient) to use alloc or autorelease initializers. E.g.:

- (NSString *)hello:(NSString *)name {
          


        

Answer 1

Comparing the performance of the two is a bit of a moot issue for a couple of reasons. First, the performance characteristics of the two might change as Clang evolves, and new optimisations are added to the compiler. Second, the benefits of skipping a few instructions here and there are dubious at best. The performance of your app should be considered across method boundaries. Deconstructing one method can be deceiving.