It’s not. Rust compilation is currently parallel at the _crate_ level (i.e. one crate is one translation unit). Speeding up compilation of large crates could le

It’s not. Rust compilation is currently parallel at the _crate_ level (i.e. one crate is one translation unit). Speeding up compilation of large crates could lead to nice speedups. > But won't this steal resources from the top-level file parallelism? It won’t. rustc uses jobserver protocol to coordinate parallelism with cargo, so the total amount of threads doing compilation of the whole project doesn’t exceed CPU count.