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

From: Eli Zaretskii <[email-masked]>
Date: Sat, 22 Jul 2023 15:00:00 +0300

> Cc: Spencer Baugh <[email-masked]>, [email-masked]
> From: [email-masked]
> Date: Sat, 22 Jul 2023 10:42:06 +0000 (UTC)
> 
> Ihor Radchenko <[email-masked]> writes:
> > Spencer Baugh <[email-masked]> writes:
> >
> >> - we could use our own recursive directory-tree walking implementation
> >> (directory-files-recursively), if we found a nice way to pipe its output
> >> directly to grep etc without going through Lisp.  (This could be nice
> >> for project-files, at least)
> >
> > May you elaborate this idea?
> 
> One of the reasons directory-files-recursively is slow is because it
> allocates memory inside Emacs.  If we piped its output directly to grep,
> that overhead would be removed.

How can you do anything in Emacs without allocating memory?