> stat is slow on modern filesystems. Is this not true?!? While working on my build times I benchmarked that something like a quarter of my time in clang was d

> stat is slow on modern filesystems. Is this not true?!? While working on my build times I benchmarked that something like a quarter of my time in clang was due to my having large numbers of sparse -I folders as the stat calls were so expensive (this was a 12" MacBook running macOS 10.14 on, I assume, APFS).