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

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Message #212 received at 64735 <at> debbugs.gnu.org (full text, mbox):

From: Ihor Radchenko <yantar92 <at> posteo.net>
To: Spencer Baugh <sbaugh <at> janestreet.com>
Cc: Dmitry Gutov <dmitry <at> gutov.dev>, 64735 <at> debbugs.gnu.org
Subject: Re: bug#64735: 29.0.92; find invocations are ~15x slower because of
 ignores
Date: Fri, 21 Jul 2023 19:37:48 +0000

Spencer Baugh <sbaugh <at> janestreet.com> writes:

>> Does find use multiple CPU cores?
>
> Not on its own, but when it's running as a separate subprocess of Emacs,
> that subprocess can (and will, on modern core-rich hardware) run on a
> different CPU core from Emacs itself.  That's a form of parallelism
> which is very achievable for Emacs, and provides a big performance win.

AFAIU, the way find is called by project.el is synchronous: (1) call
find; (2) wait until it produces all the results; (3) process the
results. In such scenario, there is no gain from subprocess.

Is any part of Emacs is even using sentinels together with find?

-- 
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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