I'm working on packaging serde for Fedora Linux, and I noticed that recent versions of serde_derive ship a precompiled binary now. This is problematic for us, since we cannot, under no circumstance...
serde_derive now ships a precompiled binary. This made a lot of people angry. The crate maintainer finally locked the issue.
Can someone explain why one would want to precompile procedural macros? Don't they get compiled only once anyways, when compiling a dependent crate for the first time? So compile time should be not that relevant?