From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Kangas Newsgroups: gmane.emacs.bugs Subject: bug#36649: 27.0.50; pure space and pdumper Date: Sun, 15 Nov 2020 07:19:51 -0800 Message-ID: References: <87a6yo5fgy.fsf@gnus.org> <83d03kaz6f.fsf@gnu.org> <87h7svc87d.fsf@igel.home> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="3018"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 36649@debbugs.gnu.org, larsi@gnus.org, eggert@cs.ucla.edu, akrl@sdf.org To: Pip Cet , Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Nov 15 16:21:14 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 1keJq4-0000ft-Nl for geb-bug-gnu-emacs@m.gmane-mx.org; 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Sun, 15 Nov 2020 15:21:02 +0000 Original-Received: (at 36649) by debbugs.gnu.org; 15 Nov 2020 15:20:02 +0000 Original-Received: from localhost ([127.0.0.1]:53971 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1keJov-0005Ul-LV for submit@debbugs.gnu.org; Sun, 15 Nov 2020 10:20:02 -0500 Original-Received: from mail-ej1-f51.google.com ([209.85.218.51]:35809) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1keJos-0005UU-D4 for 36649@debbugs.gnu.org; Sun, 15 Nov 2020 10:20:00 -0500 Original-Received: by mail-ej1-f51.google.com with SMTP id f23so20864981ejk.2 for <36649@debbugs.gnu.org>; Sun, 15 Nov 2020 07:19:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:in-reply-to:references:mime-version:date:message-id:subject:to :cc; bh=/S+4sGPjKREl+LNzSMdpuN3rUg1WboloRhEXIhreMkg=; b=n8aMFJiZVabwgEQXFde83Xk3zSXqCxPH6aaFYdwolCuczAepw5/aYHoqkdusATPJCD 2LjXImFyE63PxqIdYBdOxa+ROJodkBoRRhzU9OrvKepLxGzMNRcTM86XnZ5zgimOqEGu gCqBTzw3cemWJyNsKCW+gD9A1304Ik64MEu8+8JliDKv+PdRwzC2YKFbafq72tqmzOfT t+Zp3sqIw5WjPBvguGu0bJtSDRka2tdzijbw1+TVOruv7MdzH+GsMAUmbSMfs2mP8u/V QAgeZajreDjfcP+YKbZ2nraykPL8zoU8hdJduZHh+bQWmP7CNjcRouzwjL236Qk/GKSP Riuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:in-reply-to:references:mime-version:date :message-id:subject:to:cc; bh=/S+4sGPjKREl+LNzSMdpuN3rUg1WboloRhEXIhreMkg=; b=CcODQ7O7JqlIn3wok+KqIuCYQZqdt5ulv5vHU8D3wvuVnIvGFjn56K6YGwS06cAcAi wf7viGwylev2xYRkRpBNYpXd3HXXuxRVav0PuPPfPV/YETVoPlX1dRu3SoV7WdB8X5lB W3anXaoBg+d0HihSqvPNmV3SDwBwD0zPc2inxv3DaTwLLKpO5kK9VBak1rlPTWWCluBA 9vOjmj5PfN5j3ruejtQldGBFyU15NlxLHxl/WxhUakGakSd4hBLSk0RDxGouAasW8hr1 p3+3kKNukvlOz/FTCcVB1V1w/Aa8HIs6hOsN5l6VjHhiWmEgUEsB6jotNKJM2jjk2SOx M74Q== X-Gm-Message-State: AOAM53280zXbRQR4+GPXt0y7MlPHhLfsNLVo1/8FSC3YcfPjC4jSyJab Kvd1b4bo7+rpn0OvivjY87wAJi3DZPquU+W07v0= X-Google-Smtp-Source: ABdhPJyGntI7eWWDo5amIEgFBqAadsJu0n1EfuaZF4ZmbuvV+beo9Q5TM6LmkLnwsXNZmqaHI0dQ5Y1bmpOXrg51N04= X-Received: by 2002:a17:906:4e90:: with SMTP id v16mr11374907eju.477.1605453592503; Sun, 15 Nov 2020 07:19:52 -0800 (PST) Original-Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Sun, 15 Nov 2020 07:19:51 -0800 In-Reply-To: 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:193361 Archived-At: Pip Cet writes: > On Sat, Aug 22, 2020 at 9:59 AM Andreas Schwab wrote: >> On Aug 22 2020, Pip Cet wrote: >> > +purecopy (Lisp_Object obj); >> > >> > DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, >> > doc: /* Make a copy of object OBJ in pure storage. >> >> Perhaps purecopy should be dropped or made a no-op? > > I believe that would be a logical next step, yes. The comment in > loadup.el says hash-consing saves "around 11% of pure space", which > sounds like it isn't worth the hassle to me. > > So my suggestion would be to apply this patch first (removing the C > parts of pure space), then remove unexec, then turn purecopy into an > alias for identity and remove as many instances of it as possible. > > Just as a reminder, we're still putting a 3 MB block of zero bytes > into every emacs binary... To me, the above sounds like a reasonable plan, given the discussion in this thread and lack of any objections. > Should this be discussed on emacs-devel? Bringing this up on emacs-devel could perhaps get a few more eyes on this before it lands on master. At the very least, it would inform everyone about the planned change. So why not proceed to do that?