GNU bug report logs - #64735
29.0.92; find invocations are ~15x slower because of ignores

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Message #308 received at 64735 <at> debbugs.gnu.org (full text, mbox):

From: Ihor Radchenko <yantar92 <at> posteo.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: sbaugh <at> janestreet.com, rms <at> gnu.org, sbaugh <at> catern.com, dmitry <at> gutov.dev,
 michael.albinus <at> gmx.de, 64735 <at> debbugs.gnu.org
Subject: Re: bug#64735: 29.0.92; find invocations are ~15x slower because of
 ignores
Date: Sun, 23 Jul 2023 07:52:31 +0000

Eli Zaretskii <eliz <at> 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?

Also, another idea could be using iterators - the applications can just
request "next" file as needed, without waiting for the full file list.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

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