From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: C and Emacs Lisp code parts Date: Fri, 1 Jul 2016 17:55:15 +0000 Message-ID: <20160701175515.GA2618@acm.fritz.box> References: <624c3d37-c829-7187-a699-7d7bbc211a20@online.de> <83ziq1u668.fsf@gnu.org> <83y45lu2up.fsf@gnu.org> <54f5d80c-f20b-31aa-b438-401984fcb5b8@online.de> <874m89crw3.fsf@red-bean.com> <58c6fa18-d636-1498-8d37-b435c4ee8ec9@online.de> <83r3bdth7f.fsf@gnu.org> <06dfdf82-c469-8abe-15ab-22a96e64070b@online.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1467395736 9299 80.91.229.3 (1 Jul 2016 17:55:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 1 Jul 2016 17:55:36 +0000 (UTC) Cc: Eli Zaretskii , emacs-devel@gnu.org To: Andreas =?iso-8859-1?Q?R=F6hler?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Jul 01 19:55:26 2016 Return-path: Envelope-to: ged-emacs-devel@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 1bJ2f0-0005Ms-18 for ged-emacs-devel@m.gmane.org; Fri, 01 Jul 2016 19:55:26 +0200 Original-Received: from localhost ([::1]:34974 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bJ2ew-0004BI-0b for ged-emacs-devel@m.gmane.org; Fri, 01 Jul 2016 13:55:22 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41500) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bJ2en-00048M-0J for emacs-devel@gnu.org; Fri, 01 Jul 2016 13:55:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bJ2ei-0003H6-RZ for emacs-devel@gnu.org; Fri, 01 Jul 2016 13:55:11 -0400 Original-Received: from mail.muc.de ([193.149.48.3]:16980) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bJ2ei-0003E8-HO for emacs-devel@gnu.org; Fri, 01 Jul 2016 13:55:08 -0400 Original-Received: (qmail 50819 invoked by uid 3782); 1 Jul 2016 17:55:05 -0000 Original-Received: from acm.muc.de (p4FC46254.dip0.t-ipconnect.de [79.196.98.84]) by colin.muc.de (tmda-ofmipd) with ESMTP; Fri, 01 Jul 2016 19:55:04 +0200 Original-Received: (qmail 2643 invoked by uid 1000); 1 Jul 2016 17:55:15 -0000 Content-Disposition: inline In-Reply-To: <06dfdf82-c469-8abe-15ab-22a96e64070b@online.de> User-Agent: Mutt/1.5.24 (2015-08-30) X-Delivery-Agent: TMDA/1.1.12 (Macallan) X-Primary-Address: acm@muc.de X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x X-Received-From: 193.149.48.3 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:205046 Archived-At: Hello, Andreas. On Fri, Jul 01, 2016 at 07:36:23PM +0200, Andreas Röhler wrote: > On 01.07.2016 19:13, Eli Zaretskii wrote: > >> From: Andreas Röhler > >> Date: Fri, 1 Jul 2016 18:52:42 +0200 > >> The whole display-engine IMO is a hot candidate for a thoroughly > >> re-consideration. > > The display engine is entirely in C already, so I'm not sure what are > > you talking about. > So stuff in font-lock.el isn't display-related? It is display "related", but then pretty much everything else in Emacs is display "related" too. font-lock.el is not part of the display engine, in the sense that term is used in Emacs. Do you think that rewriting font-lock.el in C would help speed up Emacs much? If you do, why not back up your opinion with some numbers. You can get the numbers with M-x profiler-start (followed at a later stage by M-x profiler-report) or M-x elp-instrument-package (followed at a later stage by M-x elp-results). My own feeling is that font-lock.el works fast enough (i.e. even eliminating the time it takes wouldn't give a noticeable speed up), but I'm willing to be persuaded otherwise by some good numbers. -- Alan Mackenzie (Nuremberg, Germany).