From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Bug#38708: eq vs eql in byte-compiled code Date: Sat, 04 Jan 2020 14:55:40 -0500 Message-ID: References: <8cd1b5b2-b94e-ce64-0d70-c1b8b012d685@cs.ucla.edu> <22304b46-55df-578d-7ce5-97c8b60f684e@cs.ucla.edu> <613F0F55-EE3E-4A19-9A02-A0CC34172B13@acm.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="67338"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Paul Eggert , Pip Cet , Emacs developers To: Mattias =?windows-1252?Q?Engdeg=E5rd?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Jan 04 20:56:09 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1inpWp-000HN9-OK for ged-emacs-devel@m.gmane.org; Sat, 04 Jan 2020 20:56:07 +0100 Original-Received: from localhost ([::1]:36448 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1inpWo-0007fM-1k for ged-emacs-devel@m.gmane.org; Sat, 04 Jan 2020 14:56:06 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43359) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1inpWV-0007Tu-RI for emacs-devel@gnu.org; Sat, 04 Jan 2020 14:55:48 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1inpWT-0008VU-2U for emacs-devel@gnu.org; Sat, 04 Jan 2020 14:55:46 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:63298) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1inpWS-0008UU-6T for emacs-devel@gnu.org; Sat, 04 Jan 2020 14:55:44 -0500 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id AA4C344D9DE; Sat, 4 Jan 2020 14:55:43 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 7159D44D9CF; Sat, 4 Jan 2020 14:55:42 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1578167742; bh=uZtUUM6PYj4uDpFywaRNNpgvDvHLVmfBIjWkHQSk868=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=bioYJD+rUA2nE0vHfZ+2fcignyDY9DEF23RQi2cAPPz4SN5fGwFZMrzJUt39Mx7Yo 6P9R4L4iwWe0F35EM2Rv3FoG1+u95SvL1EqxWonpXTonEw6P8JpjLjUBie3BzvzOIr vD+wl7CwTAX7kIGlpe2PNzTfnD2k9bt+HY4MTpHe9qYZAW74cxE1kfWDWEXtYB4Gs9 PqP7+Kvf1cJ6GXNRaEjz2trjJIpdhuO+TZj85Co1bWDEEeR5R4/iTEXLFztJzTyxrw YU6ojuL7zerD39fg2PILRrDZfOvTAukJceGFUY/hUuzzEr5MKn6uwMs9s3qVVBGerG K+T/s93NcX2jg== Original-Received: from alfajor (65-110-220-116.cpe.pppoe.ca [65.110.220.116]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id D2724120C71; Sat, 4 Jan 2020 14:55:41 -0500 (EST) In-Reply-To: <613F0F55-EE3E-4A19-9A02-A0CC34172B13@acm.org> ("Mattias =?windows-1252?Q?Engdeg=E5rd=22's?= message of "Thu, 2 Jan 2020 18:26:29 +0100") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 132.204.25.50 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:243936 Archived-At: > In other words, making bignums/flonums slower may seem to have no bad > effects, until suddenly it has. Agreed for flonums, but not for bignums: the bignum-replacements in Emacs<27 were pretty inefficient, so I think we can use hash-consed bignums without incurring a performance cost relative to Emacs-26. IOW hash-cons'd bignums may be slower than "the best bignums we can have", but they're still faster than the "the best bignums we used to have". Stefan