@schwa @Migueldeicaza have you all tried any of the noncopyable containers we've been working on in https://github.com/apple/swift-collections?tab=readme-ov-file#basiccontainers-module for your hot paths
GitHub - apple/swift-collections: Commonly used data structures for Swift

Commonly used data structures for Swift. Contribute to apple/swift-collections development by creating an account on GitHub.

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@joe @schwa oh I had not! I need to pay more attention, which ones there?
@Migueldeicaza @schwa `UniqueArray` (which grows dynamically but has unique ownership) and `RigidArray` (which grows only up to a prespecified capacity limit) would be the closest to drop-in-replacement for existing `Array` usage