I’ve got a WSL 2 machine with LLVM project under
/mnt directory. I’ve noticed that running CMake on this project with
Unix Makefile generator takes significantly more time than with
Ninja generator. With Ninja it takes ~3-4 mins, with Makefiles it takes ~15-20 mins.
AFAIK, WSL 2 file-system is relatively slow for directories located under
/mnt ([wsl2] filesystem performance is much slower than wsl1 in /mnt · Issue #4197 · microsoft/WSL · GitHub). However, I was wondering what’s the difference between Ninja and Makefiles here? Does Makefiles generator access file-system more often than Ninja?