[comex]

But it's mostly replacing Objective-C code which was already not particularly fast – as opposed to the C++ or C code used more often in performance- or memory-sensitive areas.

My experience with Swift is somewhat limited, because every time I've tried to use it, I've run into glaring performance issues and had to switch language. It might be reasonably performant compared to Go or .NET, but it's nothing like Rust.

[trinix912]

What kind of stuff were you doing in Swift to notice performance issues? I've been developing macOS and iOS apps for a while now and it doesn't seem much slower than Objective-C.