[nnethercote]

I mentioned in the post several areas I myself haven't looked at, including cache misses. There may be room for improvements there.

There is an experimental parallel rustc front-end, e.g. see https://internals.rust-lang.org/t/help-test-parallel-rustc/1...

> any exploration of the idea of keeping track of information across builds so that incremental compilation is faster

That's exactly what incremental compilation does.

[vlovich123]

There's an effort to track which functions are modules & what the downstream implications of that are in terms of needing recompilation? Are there any links to technical descriptions? Super interested in reading up on the technical details involved.

[Muximize]

You might want to look into Salsa:

http://smallcultfollowing.com/babysteps/blog/2019/01/29/sals...

http://smallcultfollowing.com/babysteps/blog/2020/04/09/libr...