There's some information about the design in the RFC text: https://github.com/rust-lang/rfcs/blob/master/text/1298-incremental-compilation.md#high-level-design

There's some information about the design in the RFC text: https://github.com/rust-lang/rfcs/blob/master/text/1298-incremental-compilation.md#high-level-design https://github.com/rust-lang/rfcs/blob/master/text/1298-incr... AFAICT, the idea is to track and hash items like function signatures and bodies, map them to the object files produced by LLVM, and to recompile them when the hashes change.