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

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: sbaugh@catern.com, sbaugh@janestreet.com, dmitry@gutov.dev,
>  michael.albinus@gmx.de, rms@gnu.org, 64735@debbugs.gnu.org
> Date: Sun, 23 Jul 2023 07:52:31 +0000
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> Then how will the callback be different from
> >> (mapc #'my-function (directory-files-recursively ...))
> >> ?
> >
> > It depends on the application.  Applications that want to get all the
> > data and only after that process it will not use the callback.  But I
> > can certainly imagine an application that inserts the file names, or
> > some of their transforms, into a buffer, and from time to time
> > triggers redisplay to show the partial results.  Or an application
> > could write the file names to some disk file or external consumer, or
> > send them to a network process.
> 
> But won't the Elisp callback always result in a queue that will
> effectively be synchronous?

I don't understand the question (what queue?), and understand even
less what you are trying to say here.  Please elaborate.