I'd assume mostly by avoiding the need for frequent rebuilds. Incremental builds are pretty fast (at least fast enough for my needs on a moderate codebase), ful

I'd assume mostly by avoiding the need for frequent rebuilds. Incremental builds are pretty fast (at least fast enough for my needs on a moderate codebase), full rebuilds can be brutal There are also some optimization tricks related to how you split your code among crates, since a unit of compilation is mostly one crate. Putting your FFI code in a separate crate (-sys crates are the norm) and splitting some of your code in libraries that can be compiled in parallel are the common examples