GNU bug report logs - #12314
24.2.50; `add-to-history': use `setq' with `delete'

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Package: emacs;

Reported by: "Drew Adams" <drew.adams <at> oracle.com>

Date: Thu, 30 Aug 2012 23:10:01 UTC

Severity: normal

Found in version 24.2.50

Done: Chong Yidong <cyd <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #79 received at 12314 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 12314 <at> debbugs.gnu.org, cyd <at> gnu.org, drew.adams <at> oracle.com
Subject: Re: bug#12314: 24.2.50; `add-to-history': use `setq' with `delete'
Date: Sun, 09 Sep 2012 10:44:01 -0400

>> Because it avoids memory allocation.  I.e. 99% of the uses of
>> delete/delq/nconc are simple optimizations.
> I meant "why does it matter FOR THE USER that the modification was
> destructive?"  Users don't care about optimizations, they only care
> about performance.

Because this optimization improves performance,


        Stefan
This bug report was last modified 12 years and 251 days ago.

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