GNU bug report logs - #70686
30.0.50; cl--position is slow

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Package: emacs;

Reported by: No Wayman <iarchivedmywholelife <at> gmail.com>

Date: Tue, 30 Apr 2024 23:52:02 UTC

Severity: normal

Found in version 30.0.50

Done: Stefan Kangas <stefankangas <at> gmail.com>

Bug is archived. No further changes may be made.

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Message #8 received at 70686 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: No Wayman <iarchivedmywholelife <at> gmail.com>
Cc: 70686 <at> debbugs.gnu.org
Subject: Re: bug#70686: 30.0.50; cl--position is slow
Date: Wed, 01 May 2024 14:59:47 +0300

> From: No Wayman <iarchivedmywholelife <at> gmail.com>
> Date: Tue, 30 Apr 2024 19:51:23 -0400
> 
> 
> I've recently been avoiding cl-position, cl-remove-duplicates, and any other functions which use it internally. I realize there's a performance trade-off in for the flexibility such functions provide, but it may be worth investigating cl--position in particular. Today I replaced an instance of cl-remove-duplicates with an equivalent cl-loop for a 15x performance improvement at the cost of 2 lines of code.

Not sure why is this a bug report.  If cl-position is too slow for
your application, you can always use something else, something that is
less generic and more tailored to your specific sequence type(s), no?
This bug report was last modified 82 days ago.

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