4 ms·

Sounds like undefined behavior, to be honest. No wonder Apple doesn't update GCC, they might just decide to optimize all the msgSend calls one day.

• Kwpolska 7y ago
  Apple has migrated to clang/llvm a long time ago.
• Arcanum-XIII 7y ago
  Apple use Clang - they’re one of the main contributor (also on LLVM if I’m not mistaken). And they’re optimizing the innard of Objective C too.
  • stefan_ 7y ago
    whoosh Oh, I'm sure they are. That doesn't make this any less undefined.
    • saagarjha 7y ago
      What’s undefined about it?
• microtherion 7y ago
  > Sounds like undefined behavior, to be honest. Quite the opposite — it's very precisely defined behavior if you bother to read the applicable standards. It's a rather useful exercise, and I'd recommend it to anyone who makes a living using a language.