From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: master 289000e: Merge branch 'feature/native-comp' into trunk Date: Mon, 26 Apr 2021 17:02:44 +0000 Message-ID: References: <20210425182508.6CC7C2094D@vcs0.savannah.gnu.org> <831rayktot.fsf@gnu.org> <83v989jmuc.fsf@gnu.org> <83czuhjh0r.fsf@gnu.org> <83bla1jd0w.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="26730"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org, akrl@sdf.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Apr 26 19:04:55 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lb4fH-0006az-Eh for ged-emacs-devel@m.gmane-mx.org; Mon, 26 Apr 2021 19:04:55 +0200 Original-Received: from localhost ([::1]:50074 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lb4fF-0004rC-PX for ged-emacs-devel@m.gmane-mx.org; Mon, 26 Apr 2021 13:04:53 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48910) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lb4dN-0003gL-UK for emacs-devel@gnu.org; Mon, 26 Apr 2021 13:02:57 -0400 Original-Received: from colin.muc.de ([193.149.48.1]:41290 helo=mail.muc.de) by eggs.gnu.org with smtp (Exim 4.90_1) (envelope-from ) id 1lb4dH-0004hY-PE for emacs-devel@gnu.org; Mon, 26 Apr 2021 13:02:55 -0400 Original-Received: (qmail 62955 invoked by uid 3782); 26 Apr 2021 17:02:45 -0000 Original-Received: from acm.muc.de (p4fe15c82.dip0.t-ipconnect.de [79.225.92.130]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Mon, 26 Apr 2021 19:02:44 +0200 Original-Received: (qmail 8433 invoked by uid 1000); 26 Apr 2021 17:02:44 -0000 Content-Disposition: inline In-Reply-To: <83bla1jd0w.fsf@gnu.org> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.1; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:268491 Archived-At: Hello, Eli. On Mon, Apr 26, 2021 at 18:12:15 +0300, Eli Zaretskii wrote: > > Date: Mon, 26 Apr 2021 14:54:11 +0000 > > Cc: akrl@sdf.org, emacs-devel@gnu.org > > From: Alan Mackenzie > > Native compilation just doesn't seem to be working for me, yet. How > > much of a speed up should it give me? Surely more than 5% - 10%? > I don't know. If you describe your benchmark, perhaps I could run it > here and report. I use this: (defmacro time-it (&rest forms) "Time the running of a sequence of forms using `float-time'. Call like this: \"M-: (time-it (foo ...) (bar ...) ...)\"." `(let ((start (float-time))) ,@forms (- (float-time) start))) (defun time-scroll (&optional arg) (interactive "P") (message "%s" (time-it (condition-case nil (while t (if arg (scroll-down) (scroll-up)) (sit-for 0)) (error nil))))) Put point at the start of xdisp.c (or any other large file), optionally type and delete a space (to clear font-lock text properties), and do M-: (time-scroll). This scrolls through the buffer one screenful at a time, displaying each screenful, then reports the total time. I've come to the conclusion in the last hour or so that CC Mode just isn't sped up much at all by native compilation. Using Andrea's tip of C-h f c-mode + look for "natively compiled", it is clear that the natively compiled files _are_ being used. -- Alan Mackenzie (Nuremberg, Germany).