From: Paul Eggert <eggert@cs.ucla.edu>
To: Dmitry Antipov <dmantipov@yandex.ru>
Cc: Emacs development discussions <emacs-devel@gnu.org>
Subject: Re: [RFC] caar/cadr/cdar/cddr
Date: Thu, 12 Jul 2012 09:53:13 -0700 [thread overview]
Message-ID: <4FFF00F9.4070806@cs.ucla.edu> (raw)
In-Reply-To: <4FFEFA98.3060509@yandex.ru>
On 07/12/2012 09:26 AM, Dmitry Antipov wrote:
> These are widely used
How widely? I've always been leery about those
functions, myself. Since this is a performance
improvement, how much does performance improve?
Quite possibly they're a win in the C implementation,
but I'm not sure they're worth adding bytecodes for.
We might want to save bytecodes for something more
important.
Assuming they're needed, I vote for a clean
implementation of Fcaar etc. rather than tricky
ones involving loops. Especially since the tricky
loops are wrong and will infinite-loop in some
cases.
next prev parent reply other threads:[~2012-07-12 16:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-12 16:26 [RFC] caar/cadr/cdar/cddr Dmitry Antipov
2012-07-12 16:47 ` Tom Tromey
2012-07-12 16:53 ` Tom Tromey
2012-07-12 16:53 ` Paul Eggert [this message]
2012-07-12 17:44 ` Dmitry Antipov
2012-07-12 21:46 ` Samuel Bronson
2012-07-12 22:43 ` Paul Eggert
2012-07-12 23:08 ` Alp Aker
2012-07-13 0:12 ` Stefan Monnier
2012-07-13 1:27 ` Samuel Bronson
2012-07-13 12:05 ` Stefan Monnier
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