Parallel rustc is very exciting! (Thanks to @SimonSapin for making these measurements!)
See: https://internals.rust-lang.org/t/help-test-parallel-rustc/11503 …pic.twitter.com/6OuNeuoZIk
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That's an unsubstantiated guess, but I would bet money that compiling multiple C++ source files in separate processes achieves better parallelism than rustc compiling an equivalent amount of Rust source in a single crate.
Well, for now, but the point of parallel compilation is to change that :)
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