On Monday, 21 April 2014 at 20:29:46 UTC, Steven Schveighoffer
wrote:
It's pretty difficult to use manual RC and beat ARC. In fact in
some cases, ARC can beat manual, because the compiler has more
insight and knowledge of the rules being followed.
Are you sure? Have you tried to do it first with
CFRelease/CFRetain, then with ARC?
I believe this is the real reason (but I could be wrong):
«You can’t implement custom retain or release methods.»
from
https://developer.apple.com/library/mac/releasenotes/ObjectiveC/RN-TransitioningToARC/Introduction/Introduction.html
