From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: Any interest in a function like this to add to subr.el?
Date: Wed, 19 Oct 2016 21:48:15 -0400 [thread overview]
Message-ID: <jwv7f934wys.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: bc2ce222-19d8-8871-3ea9-dcd4e79f5942@yandex.ru
>>> We'd want a destructive version of it as well, though.
>> Why?
> I was thinking for performance.
I'd find it really surprising if N uses of `cons` would be
sufficiently more expensive than N uses of `setcar` not to be
drowned by the O(N*log N) funcalls and other processing.
But it wouldn't be the first time I was wrong, of course.
Stefan
next prev parent reply other threads:[~2016-10-20 1:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-18 17:53 Any interest in a function like this to add to subr.el? John Wiegley
2016-10-18 20:13 ` Dmitry Gutov
2016-10-18 20:34 ` John Wiegley
2016-10-18 21:09 ` Dmitry Gutov
2016-10-18 21:25 ` John Wiegley
2016-10-19 5:01 ` Ken Raeburn
2016-10-19 6:02 ` John Wiegley
2016-10-19 14:51 ` Stefan Monnier
2016-10-19 14:48 ` Stefan Monnier
2016-10-19 23:12 ` Dmitry Gutov
2016-10-20 1:48 ` Stefan Monnier [this message]
2016-10-19 13:46 ` Andy Moreton
2016-10-19 14:52 ` Stefan Monnier
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