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: 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: bug#64735: 29.0.92; find invocations are ~15x slower because of ignores
Date: Sun, 23 Jul 2023 09:16:40 +0000

Eli Zaretskii <eliz <at> gnu.org> writes:

>> With emacs -Q, the results are similar in terms of absolute time spent
>> doing GC:
>> 
>> (("built-in" . "Elapsed time: 5.706795s (3.332933s in 304 GCs)")
>>  ("built-in no handlers" . "Elapsed time: 4.535871s (3.161111s in 301 GCs)")
>>  ("with-find" . "Elapsed time: 4.829426s (3.333890s in 274 GCs)"))
>
> Strange.  On my system, GC takes about 8% of the run time.  Maybe it's
> a function of how many files are retrieved?

Most likely.
(length (directory-files-recursively "/usr/src/linux/" "")) ; => 145489

My test is producing a very long list of files. 10 times for each test
and for each function variant.

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