From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.org!not-for-mail
From: Jiaxin Cao <jiaxin.cao@gmail.com>
Newsgroups: gmane.emacs.help
Subject: Why emacs rendering is slow when encountering long lines?
Date: Sat, 19 Oct 2013 22:00:45 -0700 (PDT)
Message-ID: <f800010c-2f32-4882-9b04-0688a73f74c0@googlegroups.com>
NNTP-Posting-Host: plane.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
X-Trace: ger.gmane.org 1382257941 8810 80.91.229.3 (20 Oct 2013 08:32:21 GMT)
X-Complaints-To: usenet@ger.gmane.org
NNTP-Posting-Date: Sun, 20 Oct 2013 08:32:21 +0000 (UTC)
To: help-gnu-emacs@gnu.org
Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Oct 20 10:32:26 2013
Return-path: <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>
Envelope-to: geh-help-gnu-emacs@m.gmane.org
Original-Received: from lists.gnu.org ([208.118.235.17])
	by plane.gmane.org with esmtp (Exim 4.69)
	(envelope-from <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>)
	id 1VXoQz-0006vA-SH
	for geh-help-gnu-emacs@m.gmane.org; Sun, 20 Oct 2013 10:32:25 +0200
Original-Received: from localhost ([::1]:35432 helo=lists.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org>)
	id 1VXoQz-0003D1-Co
	for geh-help-gnu-emacs@m.gmane.org; Sun, 20 Oct 2013 04:32:25 -0400
X-Received: by 10.182.118.194 with SMTP id ko2mr4130830obb.32.1382245246408;
	Sat, 19 Oct 2013 22:00:46 -0700 (PDT)
X-Received: by 10.50.171.169 with SMTP id av9mr111050igc.11.1382245246318;
	Sat, 19 Oct 2013 22:00:46 -0700 (PDT)
Original-Path: usenet.stanford.edu!o2no15110477qas.0!news-out.google.com!9ni58915qaf.0!nntp.google.com!i2no22652006qav.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Original-Newsgroups: gnu.emacs.help
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
	posting-host=167.220.232.157; 
	posting-account=TLmnjwoAAACUjiKEXP3QKKOm1UObeV3K
Original-NNTP-Posting-Host: 167.220.232.157
User-Agent: G2/1.0
Injection-Date: Sun, 20 Oct 2013 05:00:46 +0000
Original-Xref: usenet.stanford.edu gnu.emacs.help:201840
X-Mailman-Approved-At: Sun, 20 Oct 2013 04:32:16 -0400
X-BeenThere: help-gnu-emacs@gnu.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/help-gnu-emacs>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org
Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org
Xref: news.gmane.org gmane.emacs.help:94109
Archived-At: <http://permalink.gmane.org/gmane.emacs.help/94109>

When I open a file containing long lines, it is not smooth to scroll up and down, even if the file is not large. 

Does anyone know how to configure emacs to make it smoother?