[kccqzy]

What I mean is daily operations on the repo like viewing a diff, committing, amending, checking out a different commit, etc. Without doing precise measurements, I would tend to think that it's mostly caused by the slowness of CPython, as compared to a C executable (Git).

The entire repo is stored on a networked file system. So essentially every file operation is remote. That doesn't actually contribute to much slowness because when I didn't use hg, operations were noticeably faster.