From mboxrd@z Thu Jan  1 00:00:00 1970
Path: main.gmane.org!not-for-mail
From: "Eli Zaretskii" <eliz@is.elta.co.il>
Newsgroups: gmane.emacs.bugs
Subject: Re: ediff-next-difference very slow
Date: Wed, 17 Apr 2002 17:56:39 +0300
Sender: bug-gnu-emacs-admin@gnu.org
Message-ID: <4532-Wed17Apr2002175638+0300-eliz@is.elta.co.il>
References: <15549.30433.173962.449867@tfkp00.physik.uni-erlangen.de>
Reply-To: Eli Zaretskii <eliz@is.elta.co.il>
NNTP-Posting-Host: localhost.gmane.org
X-Trace: main.gmane.org 1019055989 31021 127.0.0.1 (17 Apr 2002 15:06:29 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Wed, 17 Apr 2002 15:06:29 +0000 (UTC)
Cc: bug-gnu-emacs@gnu.org
Return-path: <bug-gnu-emacs-admin@gnu.org>
Original-Received: from fencepost.gnu.org ([199.232.76.164])
	by main.gmane.org with esmtp (Exim 3.33 #1 (Debian))
	id 16xr0v-00084E-00
	for <gnu-bug-gnu-emacs@m.gmane.org>; Wed, 17 Apr 2002 17:06:29 +0200
Original-Received: from localhost ([127.0.0.1] helo=fencepost.gnu.org)
	by fencepost.gnu.org with esmtp (Exim 3.34 #1 (Debian))
	id 16xr13-0007Mf-00; Wed, 17 Apr 2002 11:06:37 -0400
Original-Received: from odin.inter.net.il ([192.114.186.10])
	by fencepost.gnu.org with esmtp (Exim 3.34 #1 (Debian))
	id 16xqyJ-0007AA-00
	for <bug-gnu-emacs@gnu.org>; Wed, 17 Apr 2002 11:03:48 -0400
Original-Received: from zaretsky (diup-216-27.inter.net.il [213.8.216.27])
	by odin.inter.net.il (Mirapoint Messaging Server MOS 2.9.3.2)
	with ESMTP id ABG57863;
	Wed, 17 Apr 2002 18:03:40 +0300 (IDT)
Original-To: roland.winkler@physik.uni-erlangen.de
X-Mailer: emacs 21.2.50 (via feedmail 8 I) and Blat ver 1.8.9
In-Reply-To: <15549.30433.173962.449867@tfkp00.physik.uni-erlangen.de>
	(message from Roland Winkler on Wed, 17 Apr 2002 15:21:37 +0200)
Errors-To: bug-gnu-emacs-admin@gnu.org
X-BeenThere: bug-gnu-emacs@gnu.org
X-Mailman-Version: 2.0.9
Precedence: bulk
List-Help: <mailto:bug-gnu-emacs-request@gnu.org?subject=help>
List-Post: <mailto:bug-gnu-emacs@gnu.org>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/bug-gnu-emacs>,
	<mailto:bug-gnu-emacs-request@gnu.org?subject=subscribe>
List-Id: Bug reports for GNU Emacs,
	the Swiss army knife of text editors <bug-gnu-emacs.gnu.org>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/bug-gnu-emacs>,
	<mailto:bug-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <http://mail.gnu.org/pipermail/bug-gnu-emacs/>
Xref: main.gmane.org gmane.emacs.bugs:735
X-Report-Spam: http://spam.gmane.org/gmane.emacs.bugs:735

> From: Roland Winkler <roland.winkler@physik.uni-erlangen.de>
> Date: Wed, 17 Apr 2002 15:21:37 +0200
> 
> According to my-ediff-next, ediff-next-difference requires 1 or 2
> seconds in a fresh emacs session on my old pentium processor. But an
> emacs session that has been running for many days requires 6 or
> 7 seconds for each of the two differences between the files foo
> and bar.
> 
> What's going on here? Is this a known problem? How can I try to
> further pin down why ediff becomes so slow?

It seems that having many overlays in a buffer slows down Emacs quite
a bit.  Perhaps this problem is another manifestation of that?

> PS: node `Compilation Tips' in the elisp manual says
> 
>    * Profile your program with the `profile' library or the `elp'
>      library.  See the files `profile.el' and `elp.el' for instructions.
> 
> However, in profile.el it says that profile.el has become obsolete.

Thanks, I fixed this for the next release.