Rust compiler performance is hard to have meaningful discussions about because: (1) There’s no single part of the compiler which is slow. In fact the compiler is pretty well optimized.
I don't know about whether this is meaningful to a language like Rust, but back in the 1960s / 70s when there was massive investment in Fortran compiler technology, there were two types of compilers:
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1. Highly optimizing compilers - they spent a lot of compile time grinding out the best code they could. All the tricks in the book were fair game. 2. "Student" compilers, like WATFOR - they were optimized for compile speed. They were glorified macro assemblers.
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The thing was, there wasn't a lot of improvement in run-time performance of the compiled code between the two. On typical "dusty deck FORTRAN" you could expect a factor of two at best from the optimized code.
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