Comment by AYBABTME

Let's say 100k files is 300k syscalls, at ~1-2us per syscall. That's 300ms of syscalls. Then assume 10kb per file, that's 1GB of file, easily done in a fraction of a second when the cache is warm (it'll be from scanning the dir). That's like 600ms used up and plenty left to just parse and analyze 100k things in 2s.