I tested with rustc Git commit c7572670a1302f5c7e245d069200e22da9df0316, which (I think) includes that change.
> And for repeated clean + full build cycles there's sccache[1].
You're right. I included full builds in the article because almost-full builds happen a lot in C++ (after common certain header files, or if you think the build system broke something).
I imagine almost-full builds rarely happen when working in Rust though, so maybe I should have deemphasized my full-build benchmarks.