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

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From: Ihor Radchenko <yantar92 <at> posteo.net>
To: Dmitry Gutov <dmitry <at> gutov.dev>
Cc: Spencer Baugh <sbaugh <at> janestreet.com>, 64735 <at> debbugs.gnu.org
Subject: bug#64735: 29.0.92; find invocations are ~15x slower because of ignores
Date: Thu, 20 Jul 2023 16:03:58 +0000

Dmitry Gutov <dmitry <at> gutov.dev> writes:

>> And things are not as horrible as 15x slowdown in find.
>
> We haven't compared to the "optimized regexps" solution in find, though.

Fair point.

> Still like 2.5x slower, then? That's significant.

It is, but it is workable if we try to optimize Emacs'
`directory-files'/`file-name-all-completions' internals.

>> I am pretty sure that Emacs's native file routines can be optimized to
>> the level of find.
>
> I don't know, the GNU tools are often ridiculously optimized. At least 
> certain file paths.

You are likely right.
Then, what about applying regexps manually, on the full file list
returned by 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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