From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#24720: Performance impact of -no-pie Date: Mon, 17 Oct 2016 13:26:32 -0700 Organization: UCLA Computer Science Department Message-ID: <2e4bd054-3bed-501a-de51-55216eb2377f@cs.ucla.edu> References: <60845a3c-9167-faa1-2875-962e7025cc1f@cs.ucla.edu> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1476736542 17989 195.159.176.226 (17 Oct 2016 20:35:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 17 Oct 2016 20:35:42 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 Cc: 24720@debbugs.gnu.org To: Alex Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Oct 17 22:35:37 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@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 ) id 1bwEct-0001nE-EK for geb-bug-gnu-emacs@m.gmane.org; Mon, 17 Oct 2016 22:35:15 +0200 Original-Received: from localhost ([::1]:35847 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwEcv-0008U9-KD for geb-bug-gnu-emacs@m.gmane.org; Mon, 17 Oct 2016 16:35:17 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42280) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bwEV1-0002OQ-JC for bug-gnu-emacs@gnu.org; Mon, 17 Oct 2016 16:27:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bwEUw-0001QK-Kq for bug-gnu-emacs@gnu.org; Mon, 17 Oct 2016 16:27:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:59138) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1bwEUw-0001Pw-Hm for bug-gnu-emacs@gnu.org; Mon, 17 Oct 2016 16:27:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bwEUw-0004r8-4C for bug-gnu-emacs@gnu.org; Mon, 17 Oct 2016 16:27:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Paul Eggert Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 17 Oct 2016 20:27:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 24720 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 24720-submit@debbugs.gnu.org id=B24720.147673600118638 (code B ref 24720); Mon, 17 Oct 2016 20:27:02 +0000 Original-Received: (at 24720) by debbugs.gnu.org; 17 Oct 2016 20:26:41 +0000 Original-Received: from localhost ([127.0.0.1]:37095 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwEUb-0004qY-1e for submit@debbugs.gnu.org; Mon, 17 Oct 2016 16:26:41 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:54726) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwEUZ-0004qJ-70 for 24720@debbugs.gnu.org; Mon, 17 Oct 2016 16:26:39 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 5C78D160D69; Mon, 17 Oct 2016 13:26:33 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id pj08fIyYxhYF; Mon, 17 Oct 2016 13:26:32 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 843F3160E6E; Mon, 17 Oct 2016 13:26:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id PBMQNdWN9d-e; Mon, 17 Oct 2016 13:26:32 -0700 (PDT) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 67404160E49; Mon, 17 Oct 2016 13:26:32 -0700 (PDT) In-Reply-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:124605 Archived-At: > Is such a performance impact expected? If so, is there a plan to regain the old speed? No, such a performance change is not expected. Can you reproduce the problem with the emacs-25 or master branches, without manually adding -no-pie to CFLAGS? The bleeding-edge versions of Emacs attack the problem in a slightly different way, which might affect performance less. If you still see a performance problem, can you narrow it down, e.g., by configuring it with --enable-profiling and seeing where the extra cycles are going?