From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#32405: Turning misc objects into pseudovectors Date: Wed, 08 Aug 2018 23:58:10 -0400 Message-ID: References: <988905f1-fb41-9559-300d-d015bda4b791@cs.ucla.edu> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1533787086 7733 195.159.176.226 (9 Aug 2018 03:58:06 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 9 Aug 2018 03:58:06 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: 32405@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Aug 09 05:58:01 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1fnc5I-0001qq-QO for geb-bug-gnu-emacs@m.gmane.org; Thu, 09 Aug 2018 05:58:00 +0200 Original-Received: from localhost ([::1]:46970 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fnc7N-0002nB-9n for geb-bug-gnu-emacs@m.gmane.org; Thu, 09 Aug 2018 00:00:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47532) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fnc6n-0002X4-FY for bug-gnu-emacs@gnu.org; Thu, 09 Aug 2018 00:00:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fnc6I-0005KF-Ap for bug-gnu-emacs@gnu.org; Wed, 08 Aug 2018 23:59:33 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:40412) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fnc6H-0005J3-Vn for bug-gnu-emacs@gnu.org; Wed, 08 Aug 2018 23:59:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fnc6H-0003rS-Nr for bug-gnu-emacs@gnu.org; Wed, 08 Aug 2018 23:59:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 09 Aug 2018 03:59:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 32405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 32405-submit@debbugs.gnu.org id=B32405.153378709714767 (code B ref 32405); Thu, 09 Aug 2018 03:59:01 +0000 Original-Received: (at 32405) by debbugs.gnu.org; 9 Aug 2018 03:58:17 +0000 Original-Received: from localhost ([127.0.0.1]:45430 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fnc5Z-0003q7-CA for submit@debbugs.gnu.org; Wed, 08 Aug 2018 23:58:17 -0400 Original-Received: from chene.dit.umontreal.ca ([132.204.246.20]:40541) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fnc5W-0003py-IU for 32405@debbugs.gnu.org; Wed, 08 Aug 2018 23:58:15 -0400 Original-Received: from fmsmemgm.homelinux.net (lechon.iro.umontreal.ca [132.204.27.242]) by chene.dit.umontreal.ca (8.14.7/8.14.1) with ESMTP id w793wB00016528 for <32405@debbugs.gnu.org>; Wed, 8 Aug 2018 23:58:12 -0400 Original-Received: by fmsmemgm.homelinux.net (Postfix, from userid 20848) id 0049CAE16B; Wed, 8 Aug 2018 23:58:10 -0400 (EDT) In-Reply-To: <988905f1-fb41-9559-300d-d015bda4b791@cs.ucla.edu> (Paul Eggert's message of "Wed, 8 Aug 2018 20:07:30 -0700") X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 2 Rules triggered EDT_SA_DN_PASS=0, RV6347=0 X-NAI-Spam-Version: 2.3.0.9418 : core <6347> : inlines <6806> : streams <1794964> : uri <2686184> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:149369 Archived-At: > Bug#32405 contains a patch that will get rid of the miscellaneous-object > category of the Emacs Lisp interpreter, and will change these objects to be > pseudovectors instead. The motivation is to simplify the interpreter and > garbage collector and speed it up slightly, and to simplify potential > future changes. I like the idea, but: AFAIK the main issue with pseudovectors is that their allocation is slower and suffers more from fragmentation (because we don't use a size-segregated allocation algorithm (like Linux's SLAB, for example) for them). Are you sure the new code is faster overall? There is also a potential issue in terms of the resulting heap size of markers (which may bump up from 6 words to 8 words, IIRC, unless your patch does something to keep it down to 6), tho this is probably of no real consequence. Stefan