I didn't even measure it because it never finished :-) I built

a backend-style based completion table based on

voidtools everything (https://www.voidtools.com/downloads/)

with regexp completion. It's pretty fast.

I had hoped to plug it in project.el but I couldn't find a way, so

I rebound C-x p f to it.

João

On Sat, Nov 19, 2022 at 1:13 AM Dmitry Gutov <dgutov@yandex.ru> wrote:

On 18.11.2022 20:31, João Távora wrote:
> Fwiw, Danny's tip is what I used at a recent day job gig for defining
> subprojects in a 400k files repo.

How did you like the drop in performance of 'M-x project-find-file'
resulting from it?

João Távora