bug#24126: vc-hg-state can be extremely slow

[Dmitry Gutov]

On 15.08.2021 15:30, Lars Ingebrigtsen wrote:
> This was five years ago -- I tried reproducing this by instrumenting
> `vg-hg-state' in a hg-covered directory, and that function was not
> called when doing vc-root-diff there.

I think that only happens once per root per Emacs session (after that 
the directory's backend is cached).

> So has this been fixed in the intervening years?

Probably not.

It's not too slow here in the project I've tried it with, but it doesn't 
have many ignored files (which was the situation in the report).