Chez compiles a 80Kloc project of mine in less than a second, and apparently that is still 2x slower than before they switched to a nanopass compiler.

There is no reason compiling things should not compile at similar speeds to chez unless you are telling your compiler to ootimise everything.

C++/ruae are just exceptionally slow and it became the new bottom line somehow. I know rust does a lot of housekeeping, but after using chez and sbcl, 45s for a 1.5kloc project is killing me inside.