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 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