From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: narrowing considered harmful Date: Mon, 17 Jun 2013 10:56:07 -0400 Message-ID: References: <51AC4543.1000508@easy-emacs.de> <51AC4C03.7050504@easy-emacs.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1371481813 12802 80.91.229.3 (17 Jun 2013 15:10:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 17 Jun 2013 15:10:13 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Jun 17 17:10:13 2013 Return-path: 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 ) id 1Uob4N-0008L0-KJ for geh-help-gnu-emacs@m.gmane.org; Mon, 17 Jun 2013 17:10:11 +0200 Original-Received: from localhost ([::1]:45401 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uob4N-0006aC-5H for geh-help-gnu-emacs@m.gmane.org; Mon, 17 Jun 2013 11:10:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58146) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uob40-0006SQ-W8 for help-gnu-emacs@gnu.org; Mon, 17 Jun 2013 11:09:50 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Uob3z-0008Am-UZ for help-gnu-emacs@gnu.org; Mon, 17 Jun 2013 11:09:48 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:57684) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Uoar5-0003WY-3T for help-gnu-emacs@gnu.org; Mon, 17 Jun 2013 10:56:27 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Uoar3-0000z6-3S for help-gnu-emacs@gnu.org; Mon, 17 Jun 2013 16:56:25 +0200 Original-Received: from 69-165-149-114.dsl.teksavvy.com ([69.165.149.114]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 17 Jun 2013 16:56:25 +0200 Original-Received: from monnier by 69-165-149-114.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 17 Jun 2013 16:56:25 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 22 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 69-165-149-114.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) Cancel-Lock: sha1:2meV+arYuC+rWJOpdR1AV1+1QeY= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-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:91578 Archived-At: >> I wouldn't worry about it. It can even be a bad idea (set-marker to >> nil requires scanning the whole list of markers, so it can take a while. >> It can be more efficient to let the GC collect them later on). >> >> >> Stefan > Good to know this. The manual contains this: > ,----[ (info "(elisp)Overview of Markers") ] > | ;; When you are finished using a marker, make it point nowhere. > | (set-marker m1 nil) > | => # > `---- > Should that be changed? Not necessarily: whether it's better to nil them explicitly or to leave them as they are depends on the specific case. Stefan