3 ms·If you don't consider Swift style Automatic Reference Counting a GC, then there is another option.by surajrmal 5y agoIf you don't consider Swift style Automatic Reference Counting a GC, then there is another option.pcwalton 5y agoThat's a form of garbage collection. :)skohan 5y agoThe problem with ARC in swift is that it’s always atomic. This is fast enough on ARM, but on x86 it’s really slow