

Off the top of my head the compiler is slow because:
- With C you can compile every file in parallel, in Rust compilation of a single crate is serial (hence splitting up large projects into many crates is important, but that makes development somewhat more difficult)
- LLVM itself is pretty slow
- Generic functions are monomorphized (there’s a unique machine code version of it for every concrete type combination they are called with) to improve runtime performance, but that gives LLVM a lot more work to do - see point 2
Or Fedora