From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#42147: 28.0.50; pure vs side-effect-free, missing optimizations? Date: Sun, 05 Jul 2020 10:03:20 +0000 Message-ID: References: <3A9CC2A3-8307-47B2-8D80-795C0AF020E1@acm.org> <1621669100.2102667.1593639091621@mail.yahoo.com> <775819003.2516724.1593687594435@mail.yahoo.com> <5F2B4684-34D1-4474-8909-9F435369FE54@acm.org> <705260433.2731607.1593698199171@mail.yahoo.com> <6CF8EE58-9A49-40E7-AA86-48AB39BF94BA@acm.org> <28B19D86-343C-4126-B95F-1F38735F73F2@acm.org> <1288c6a5-545b-f68c-ff6b-7683db3e54c1@cs.ucla.edu> <0AF276D8-FB28-4745-AAE4-DC30E0441F89@acm.org> <793d67e0-68a0-fc53-89a9-0902747d6389@cs.ucla.edu> <83zh8ftfwr.fsf@gnu.org> <672f15b0-04f9-e884-4815-85ca1d1af9bb@cs.ucla.edu> <6d8ba3b1-86b8-3dc8-3d80-17222d436b80@cs.ucla.edu> Reply-To: Andrea Corallo Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20593"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) Cc: mattiase@acm.org, andrea_corallo@yahoo.it, Stefan Monnier , Pip Cet , 42147@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jul 05 12:04:10 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1js1VK-0005Dm-09 for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 05 Jul 2020 12:04:10 +0200 Original-Received: from localhost ([::1]:33578 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1js1VI-0006zi-Cs for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 05 Jul 2020 06:04:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:45828) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1js1VC-0006zc-BI for bug-gnu-emacs@gnu.org; Sun, 05 Jul 2020 06:04:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:48519) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1js1VC-00050M-1q for bug-gnu-emacs@gnu.org; Sun, 05 Jul 2020 06:04:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1js1VB-000296-SJ for bug-gnu-emacs@gnu.org; Sun, 05 Jul 2020 06:04:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Andrea Corallo Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 05 Jul 2020 10:04:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 42147 X-GNU-PR-Package: emacs Original-Received: via spool by 42147-submit@debbugs.gnu.org id=B42147.15939434258225 (code B ref 42147); Sun, 05 Jul 2020 10:04:01 +0000 Original-Received: (at 42147) by debbugs.gnu.org; 5 Jul 2020 10:03:45 +0000 Original-Received: from localhost ([127.0.0.1]:60065 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1js1Uu-00028a-LO for submit@debbugs.gnu.org; Sun, 05 Jul 2020 06:03:44 -0400 Original-Received: from mx.sdf.org ([205.166.94.23]:55819) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1js1Uq-00028Q-0X for 42147@debbugs.gnu.org; Sun, 05 Jul 2020 06:03:43 -0400 Original-Received: from mab (ma.sdf.org [205.166.94.33]) by mx.sdf.org (8.15.2/8.14.5) with ESMTP id 065A3KAK029081; Sun, 5 Jul 2020 10:03:21 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=sdf.org; s=default; t=1593943404; bh=3wrqDGIus+sUS/wBjSU4ZrqvhOmSsWlzkJNv6X2SaY8=; h=From:To:Cc:Subject:References:Date:In-Reply-To; b=RpAGAock2xIubhq7o9XXucqHYXsq2bQUy28VN7QgoCmfNudtqYJytfRl+yC5LDZYx DFqMEj+VTYJk91lMwjlu0pGhufCHqWefajCV15xrhRWFBARxwwj8xSPIwBDDSqfPFO CH82P4FN9SPBXu27viq15p2JBZLbiqjh+ol6Sbts= In-Reply-To: (Paul Eggert's message of "Sun, 5 Jul 2020 02:56:23 -0700") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:182733 Archived-At: Paul Eggert writes: > PS. I finally got around to benchmarking, and on my usual benchmark (make > compile-always, Fedora 31 x86), using SSE2 sped up Emacs by 4.6%. So there is a > performance argument for the change as well as a fix-the-rounding-glitches argument. Hi Paul, Wow I'm really surprised by this result! Are we doing so much floating point while compiling Emacs? I expected it to be very marginal, possibly something else is boiling here we are not considering? Regards Andrea -- akrl@sdf.org