From mboxrd@z Thu Jan  1 00:00:00 1970
Path: main.gmane.org!not-for-mail
From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: malloc and alignment
Date: Sat, 28 Jun 2003 22:30:31 -0400
Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org
Message-ID: <E19WRxX-0006HX-9T@fencepost.gnu.org>
References: <200306161438.h5GEcodM011551@rum.cs.yale.edu>
	<E19SJCe-0008Bb-Vp@fencepost.gnu.org>
	<200306242252.h5OMqWMA001579@rum.cs.yale.edu>
	<E19VGK5-0000CQ-F4@fencepost.gnu.org>
	<200306272317.h5RNHcqQ026907@rum.cs.yale.edu>
Reply-To: rms@gnu.org
NNTP-Posting-Host: main.gmane.org
X-Trace: main.gmane.org 1056854099 23476 80.91.224.249 (29 Jun 2003 02:34:59 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Sun, 29 Jun 2003 02:34:59 +0000 (UTC)
Cc: emacs-devel@gnu.org
Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Sun Jun 29 04:34:57 2003
Return-path: <emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org>
Original-Received: from quimby.gnus.org ([80.91.224.244])
	by main.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 19WS1p-00066S-00
	for <emacs-devel@main.gmane.org>; Sun, 29 Jun 2003 04:34:57 +0200
Original-Received: from monty-python.gnu.org ([199.232.76.173])
	by quimby.gnus.org with esmtp (Exim 3.12 #1 (Debian))
	id 19WS7U-0005SX-00
	for <emacs-devel@quimby.gnus.org>; Sun, 29 Jun 2003 04:40:55 +0200
Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org)
	by monty-python.gnu.org with esmtp (Exim 4.20)
	id 19WS1W-0004jw-BL
	for emacs-devel@quimby.gnus.org; Sat, 28 Jun 2003 22:34:38 -0400
Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.20)
	id 19WRzN-0003al-Ff
	for emacs-devel@gnu.org; Sat, 28 Jun 2003 22:32:25 -0400
Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.20)
	id 19WRyF-00036L-1J
	for emacs-devel@gnu.org; Sat, 28 Jun 2003 22:31:16 -0400
Original-Received: from fencepost.gnu.org ([199.232.76.164])
	by monty-python.gnu.org with esmtp (Exim 4.20)
	id 19WRxX-0002Sr-Md
	for emacs-devel@gnu.org; Sat, 28 Jun 2003 22:30:31 -0400
Original-Received: from rms by fencepost.gnu.org with local (Exim 4.20)
	id 19WRxX-0006HX-9T; Sat, 28 Jun 2003 22:30:31 -0400
Original-To: "Stefan Monnier" <monnier+gnu/emacs@cs.yale.edu>
In-reply-to: <200306272317.h5RNHcqQ026907@rum.cs.yale.edu>
	(monnier+gnu/emacs@cs.yale.edu)
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1b5
Precedence: list
List-Id: Emacs development discussions. <emacs-devel.gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Post: <mailto:emacs-devel@gnu.org>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=subscribe>
List-Archive: <http://mail.gnu.org/pipermail/emacs-devel>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org
Xref: main.gmane.org gmane.emacs.devel:15317
X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:15317

    In all three cases, malloc (or memalign) itself does not use up much
    extra memory (in the case of memalign, it uses up a lot of memory
    if we memalign (16384) which is why I only memalign (16380).

    The actual number of bytes per float used up in the three cases is:
    - 12.14
    - 8.74
    - 8.26

With those ratios, I'd say it is efficient enough, for cons cells too.
Please install your changes.