From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Using the GNU GMP Library for Bignums in Emacs Date: Fri, 27 Apr 2018 12:08:15 -0400 Message-ID: References: <29f933ac-a6bf-8742-66a7-0a9d6d3e5a88@disroot.org> <83bmecy6fx.fsf@gnu.org> <0d3175d8-d996-651e-b221-71978bde3a65@cs.ucla.edu> <51e619e0-ee38-eb97-6c1d-0925b675290a@disroot.org> <55c1e23c-1b9d-1a95-c683-5bf453967c51@cs.ucla.edu> <87o9i67j1o.fsf@tromey.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1524845188 19499 195.159.176.226 (27 Apr 2018 16:06:28 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 27 Apr 2018 16:06:28 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Apr 27 18:06:24 2018 Return-path: Envelope-to: ged-emacs-devel@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 1fC5tA-0004yB-HS for ged-emacs-devel@m.gmane.org; Fri, 27 Apr 2018 18:06:24 +0200 Original-Received: from localhost ([::1]:48999 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fC5vH-0007BY-4y for ged-emacs-devel@m.gmane.org; Fri, 27 Apr 2018 12:08:35 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37793) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fC5vA-0007BF-CN for emacs-devel@gnu.org; Fri, 27 Apr 2018 12:08:29 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fC5v5-000866-Ea for emacs-devel@gnu.org; Fri, 27 Apr 2018 12:08:28 -0400 Original-Received: from [195.159.176.226] (port=42908 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fC5v5-000858-7C for emacs-devel@gnu.org; Fri, 27 Apr 2018 12:08:23 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1fC5sw-0004iI-3R for emacs-devel@gnu.org; Fri, 27 Apr 2018 18:06:10 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 18 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:dUGflCJFQH1rmTqVk4IT7X91hUc= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 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:224925 Archived-At: > > I think Emacs should move in this direction: define `eq` to be the same > > as `eql`, then check every use of EQ in the C code to see if it will > > necessarily behave identically to "EQL" and where it doesn't, replace it > > with EQL. > > This is a lot of work and will slow down some loops. It's hard to tell without measuring it first. And I'd expect that many/most of those loops can be made fast anyway (e.g. member/memql can delegate to `memq` when the argument is such that eq/eql/equal behave identically). > I would rather try the obvious approach: eq treats bignums like floats. While I'm writing this within the GMP thread, it's orthogonal. Stefan