From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Pip Cet Newsgroups: gmane.emacs.bugs Subject: bug#36649: 27.0.50; pure space and pdumper Date: Fri, 28 Aug 2020 12:32:10 +0000 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="4887"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 36649@debbugs.gnu.org, eggert@cs.ucla.edu, larsi@gnus.org, akrl@sdf.org To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Aug 28 14:33:12 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 1kBdZ9-00019L-NT for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 28 Aug 2020 12:33:02 +0000 Original-Received: (at 36649) by debbugs.gnu.org; 28 Aug 2020 12:32:54 +0000 Original-Received: from localhost ([127.0.0.1]:45435 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kBdYs-00043g-AS for submit@debbugs.gnu.org; Fri, 28 Aug 2020 08:32:54 -0400 Original-Received: from mail-ot1-f46.google.com ([209.85.210.46]:45570) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kBdYq-00043R-LY for 36649@debbugs.gnu.org; Fri, 28 Aug 2020 08:32:53 -0400 Original-Received: by mail-ot1-f46.google.com with SMTP id 5so612236otp.12 for <36649@debbugs.gnu.org>; Fri, 28 Aug 2020 05:32:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=OxXeW+087aMam9OP08EN4fVAmtp7jALjh9QTcvzs1f8=; b=DL6OhxyaqQ9nN6CxSFDSupCZnkFfYEaWCNz2p1L+uDXB1X6ULJ+3CjD0Ws/4zXIdMy Qh0JVIb0HtZ77KB4hxbfSo2t+yC9Cz6q3iJmek4HpmSIa0QGIdPBl0U+lDyWKuUKM3f5 LM9iKmjnCXi/4qhX7lMcnFoJWxjzmKSOxfl6+0F5Qj7KcpiquywN2sY18ptk3V8vTvw0 HD4zuHhQHHaRMHZiCDTIci0SGGHbxFN71FziczJ48wba07Z6nngKgEIv3+Zt15mWkOyw ARzL+4dXA9wRaPgq/j5tGQ14KOQ4/D7AMFN/nzIFtpXSS0dLA/DSOUYTG50VkX5Vcr7P kXaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=OxXeW+087aMam9OP08EN4fVAmtp7jALjh9QTcvzs1f8=; b=t2Q6Kh/kWggqKPAuKMgxNSjZtbZytd8LOJmf68sfIgeWYRjajmXK+PUZtVq0rCWIPw WZaAKuhqSagp1jWWnO1CClGKdpTQKX9u9QVCcwYDN8mZaxvwuMgQPH3d3iDiUSvvP6fz Y6b2T25E+nDfKjc4PiOzkzSgaQ5uhc8uMk7NlfF2etDjcAT/cKi55IA+xQUGB312xaOM B6T0CUdwJc7eQTvLS894ABKIthdPxzh0rXMjTyioGFL7A05xx7qeTizMmJseDZ7H4+eZ jfCI8zRibDs+TobTl0gfVT8vbaABXvwiGhXQpCDkX69EbkFyV+xbwI9eVlm1lDtSQMY+ yIgA== X-Gm-Message-State: AOAM5326L5dCrFgKS+zndBE+FR35T+v0BAoESUvaoJSMCNIuuMDxSbWu mwL817DerQ+7XmmFJu+LCph6Tayn3mJMKBibbjI= X-Google-Smtp-Source: ABdhPJwCYhTxmNyoNzWllvXlUYKlMPVbKPqR6d9MgU8FNS8/72VwoGjozWhhkuoHY1pcznd04cOduqRyyFP2q4QMlLI= X-Received: by 2002:a9d:6d92:: with SMTP id x18mr916240otp.287.1598617966757; Fri, 28 Aug 2020 05:32:46 -0700 (PDT) In-Reply-To: <87h7svc87d.fsf@igel.home> 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:186599 Archived-At: 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... Should this be discussed on emacs-devel? I've CC'd Andrea since I believe the native-comp branch interacts with pure space in complicated ways.