alt Hacker NewsCan 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.