From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#12314: 24.2.50; `add-to-history': use `setq' with `delete' Date: Sun, 09 Sep 2012 20:14:23 +0300 Message-ID: <83392rm840.fsf@gnu.org> References: <7602D24B74DE42CF9901322634B85CA2@us.oracle.com> <87sjas4mc2.fsf@gnu.org> <83ipbomv6e.fsf@gnu.org> <2C45207ADF0E46BC98AF1B486695F632@us.oracle.com> <83fw6smti6.fsf@gnu.org> <9A8F619FD7584123A6319BD089E444E4@us.oracle.com> <83bohgmrdv.fsf@gnu.org> <83a9x0mq5e.fsf@gnu.org> <8E40573C868D4B339513A16A02588F5E@us.oracle.com> <837gs4mcqy.fsf@gnu.org> <83627nnc2l.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1347210939 32295 80.91.229.3 (9 Sep 2012 17:15:39 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 9 Sep 2012 17:15:39 +0000 (UTC) Cc: 12314@debbugs.gnu.org, cyd@gnu.org To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Sep 09 19:15:41 2012 Return-path: Envelope-to: geb-bug-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 1TAl6i-00030b-8u for geb-bug-gnu-emacs@m.gmane.org; Sun, 09 Sep 2012 19:15:40 +0200 Original-Received: from localhost ([::1]:49498 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TAl6e-0003s6-Hb for geb-bug-gnu-emacs@m.gmane.org; Sun, 09 Sep 2012 13:15:36 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:38702) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TAl6b-0003rm-NA for bug-gnu-emacs@gnu.org; Sun, 09 Sep 2012 13:15:34 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TAl6a-0001mS-Jj for bug-gnu-emacs@gnu.org; Sun, 09 Sep 2012 13:15:33 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:40957) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TAl6a-0001mO-GK for bug-gnu-emacs@gnu.org; Sun, 09 Sep 2012 13:15:32 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TAl74-0001mr-B4 for bug-gnu-emacs@gnu.org; Sun, 09 Sep 2012 13:16:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 09 Sep 2012 17:16:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12314 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12314-submit@debbugs.gnu.org id=B12314.13472109386838 (code B ref 12314); Sun, 09 Sep 2012 17:16:02 +0000 Original-Received: (at 12314) by debbugs.gnu.org; 9 Sep 2012 17:15:38 +0000 Original-Received: from localhost ([127.0.0.1]:50502 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TAl6g-0001mE-G9 for submit@debbugs.gnu.org; Sun, 09 Sep 2012 13:15:38 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:43003) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TAl6e-0001m4-9F for 12314@debbugs.gnu.org; Sun, 09 Sep 2012 13:15:37 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0MA300000EJNTD00@a-mtaout20.012.net.il> for 12314@debbugs.gnu.org; Sun, 09 Sep 2012 20:14:18 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MA3000EAEJU96B0@a-mtaout20.012.net.il>; Sun, 09 Sep 2012 20:14:18 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:64009 Archived-At: > From: Stefan Monnier > Cc: drew.adams@oracle.com, 12314@debbugs.gnu.org, cyd@gnu.org > Date: Sun, 09 Sep 2012 10:44:01 -0400 > > >> Because it avoids memory allocation. I.e. 99% of the uses of > >> delete/delq/nconc are simple optimizations. > > I meant "why does it matter FOR THE USER that the modification was > > destructive?" Users don't care about optimizations, they only care > > about performance. > > Because this optimization improves performance, But this optimization was already done. We don't tell users in the manuals about each and every optimization we do to improve performance, do we?