From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!.POSTED!not-for-mail
From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Making font-lock handle long lines better
Date: Sat, 11 Feb 2017 22:28:38 +0200
Message-ID: <83lgtc3215.fsf@gnu.org>
References: <CA+caGh_JN9FRi71VjUTwvYBKKygG-KuGGoe3GBgjthPRh00nRg@mail.gmail.com>
	<83wpcy2eun.fsf@gnu.org>
	<CAFXAjY4ED1L=T1zB-v=U-_DWbkOaO8+4cDidejBunS-RC3D7zQ@mail.gmail.com>
Reply-To: Eli Zaretskii <eliz@gnu.org>
NNTP-Posting-Host: blaine.gmane.org
X-Trace: blaine.gmane.org 1486844956 20082 195.159.176.226 (11 Feb 2017 20:29:16 GMT)
X-Complaints-To: usenet@blaine.gmane.org
NNTP-Posting-Date: Sat, 11 Feb 2017 20:29:16 +0000 (UTC)
Cc: public@ryanb.org, emacs-devel@gnu.org
To: Wilfred Hughes <me@wilfred.me.uk>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Feb 11 21:29:12 2017
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>
Envelope-to: ged-emacs-devel@m.gmane.org
Original-Received: from lists.gnu.org ([208.118.235.17])
	by blaine.gmane.org with esmtp (Exim 4.84_2)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>)
	id 1cceIB-0004xW-UO
	for ged-emacs-devel@m.gmane.org; Sat, 11 Feb 2017 21:29:12 +0100
Original-Received: from localhost ([::1]:49479 helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>)
	id 1cceIH-0005af-MD
	for ged-emacs-devel@m.gmane.org; Sat, 11 Feb 2017 15:29:17 -0500
Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51589)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <eliz@gnu.org>) id 1cceHg-0005Y6-DL
	for emacs-devel@gnu.org; Sat, 11 Feb 2017 15:28:41 -0500
Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <eliz@gnu.org>) id 1cceHc-0000W0-GM
	for emacs-devel@gnu.org; Sat, 11 Feb 2017 15:28:40 -0500
Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:38776)
	by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <eliz@gnu.org>)
	id 1cceHc-0000Vt-D0; Sat, 11 Feb 2017 15:28:36 -0500
Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:2730
	helo=home-c4e4a596f7)
	by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256)
	(Exim 4.82) (envelope-from <eliz@gnu.org>)
	id 1cceHa-0005NK-PW; Sat, 11 Feb 2017 15:28:36 -0500
In-reply-to: <CAFXAjY4ED1L=T1zB-v=U-_DWbkOaO8+4cDidejBunS-RC3D7zQ@mail.gmail.com>
	(message from Wilfred Hughes on Sat, 11 Feb 2017 20:10:15 +0000)
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]
X-Received-From: 2001:4830:134:3::e
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.21
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-devel/>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
	<mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org
Original-Sender: "Emacs-devel" <emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org>
Xref: news.gmane.org gmane.emacs.devel:212244
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/212244>

> From: Wilfred Hughes <me@wilfred.me.uk>
> Date: Sat, 11 Feb 2017 20:10:15 +0000
> Cc: Ryan B <public@ryanb.org>, emacs-devel <emacs-devel@gnu.org>
> 
> > If you can attach to your report a minimal test
> > case that exhibits the problematic behavior, it will be appreciated.
> 
> I have a minimal test case in
> http://emacs.stackexchange.com/questions/598/how-do-i-prevent-extremely-long-lines-making-emacs-slow
> which has a few useful suggestions for workarounds.

Since it's slow in Fundamental mode as well, it's unrelated to
font-lock, and thus to this thread.  Display of very long lines is
known to be slow in Emacs.