> > I built > > a backend-style based completion table based on > > voidtools everything (https://www.voidtools.com/downloads/ > > ) > > with regexp completion. It's pretty fast. > > That's Windows-only, right? > Yes. That's what I'm using there. > 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. > > Should be easy enough: you create your own backend (rather than reusing > 'transient') and override the generic 'project-files'. Then add it to > project-find-functions. > iiuc project-files should return a list of files, or can it return a completion table as well? If not the latter, then i think it won't work... Anyway, this is the problem with the popular recommendation: just add a > thing to 'project-find-functions'. It degrades performance and changes > how project commands work too. > I don't see the relation. If anything this reduces the amount of files to search (but it's still a lot). >