Can you (err... buildcache) cache Rust proc-macros? I've been battling this with sccache and I'm now maintaining a 10-patch deep stack for the next.js build CI.

Windows builds were ridiculously poor on cache hits rates too because of non-determinism that was not able to figure out.

I'd be happy to test it out.

There was an experimental PR that treats proc macros as idempotent with the corresponding colpike speed up. I don't know what happened with it, and stabilization required a lot of design work to not break backcompat. But this is something in the team's radar.

I guess “purge 17% of the code” is not the correct answer?

wow, 17% is impressive with such an easy fix. i wonder if we could just build this as a separate project and pull the webidl files as a dependency.

Why compile code when ccache faster

buildcache, the program the post is about can use a remote server for storing the cache.

sccache can, but most of us don't have access to an sccache instance: https://github.com/mozilla/sccache

I will just say this: it is unfortunate that you have chosen not to engage with the content of the article.

Considering that Firefox mainly appeals to its own contributors, making the developer experience better would be important.