bug#64735: 29.0.92; find invocations are ~15x slower because of ignores

[Eli Zaretskii]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: Eli Zaretskii <eliz@gnu.org>,  dmitry@gutov.dev,  64735@debbugs.gnu.org,
>   sbaugh@janestreet.com
> Date: Fri, 21 Jul 2023 17:49:14 +0200
> 
> Ihor Radchenko <yantar92@posteo.net> writes:
> 
> Hi Ihor,
> 
> >> My point was to show the differences in the approaches. Do you have also
> >> numbers using without-remote-files and inhibit-remote-files?
> >
> > (length (directory-files-recursively "~/Git" ""))
> > ;; => 113628
> > (benchmark-run-compiled 1 (directory-files-recursively "~/Git" ""))
> > ;; => (1.597328425 1 0.47237324699997885)
> > (benchmark-run-compiled 1 (let (file-name-handler-alist) 
> > (directory-files-recursively "~/Git" "")))
> > ;; => (1.0012111910000001 1 0.4860752540000135)
> > (benchmark-run-compiled 1 (without-remote-files 
> > (directory-files-recursively "~/Git" "")))
> > ;; => (1.147276594 1 0.48820330999998873)
> > (inhibit-remote-files)
> > (benchmark-run-compiled 1 (directory-files-recursively "~/Git" ""))
> > ;; => (1.054041615 1 0.4141427399999884)
> 
> Thanks a lot! These figures show, that both without-remote-files and
> inhibit-remote-files are useful. Of course this shouldn't stop us to
> find further approaches for performance optimizations.
> 
> I'll wait for some days whether there's opposition, before installing
> them in master.

Can you spell out what you intend to install?

The figures provided in this thread indicate speedups that are modest
at best, so I'm not sure they justify measures which could cause
problems (if that indeed could happen).