It's not ARC though. They use fancy threading mechanisms to avoid having to check on every access. Much faster.

"Swift uses Automatic Reference Counting (ARC) to track and manage your app’s memory usage."

	▲	bluegatty 3 days ago \| parent [-]
		I meant 'not like rust-Arc' :) ... which is what I thought people were referring to. Yes - it's ref counting, but it's not like 'Arc' at all - ARC is way more thread aware and most 'access' doesn't have to do thread checking. Much faster. So - using Rust 'Arc' would not be at all like using Swift 'ARC' in the end.