From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.devel Subject: Re: Turning Gnus groups into real objects Date: Wed, 17 Jul 2019 15:08:47 -0700 Message-ID: <877e8g5n68.fsf@ericabrahamsen.net> References: <87k1cg5ujl.fsf@ericabrahamsen.net> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="152407"; mail-complaints-to="usenet@blaine.gmane.org" 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 Thu Jul 18 00:10:11 2019 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 1hns7l-000dZ5-Pa for ged-emacs-devel@m.gmane.org; Thu, 18 Jul 2019 00:10:09 +0200 Original-Received: from localhost ([::1]:60744 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hns7k-0000sO-Bi for ged-emacs-devel@m.gmane.org; Wed, 17 Jul 2019 18:10:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60418) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hns7h-0000sI-Th for emacs-devel@gnu.org; Wed, 17 Jul 2019 18:10:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hns7h-0006p7-1N for emacs-devel@gnu.org; Wed, 17 Jul 2019 18:10:05 -0400 Original-Received: from 195-159-176-226.customer.powertech.no ([195.159.176.226]:53504 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hns7g-0006on-PC for emacs-devel@gnu.org; Wed, 17 Jul 2019 18:10:04 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1hns7e-000dSI-KN for emacs-devel@gnu.org; Thu, 18 Jul 2019 00:10:02 +0200 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:xCEC2XYpAfsmMe2eCKQqsGC8qK4= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 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:238626 Archived-At: Stefan Monnier writes: >> I'd like to turn groups into real objects > > I think that can make a fair bit of sense. > >> using EIEIO. > > But I have to warn you that EIEIO objects are pretty costly, i.e. slow > to construct (which goes through `make-instance`) and slow to access > their slots (which goes through `slot-value`). Depending on your code's > structure it might not matter too much, or it might render the code > unacceptably slow. > > If creation of those objects and/or access to their slots is expected to > be frequent enough to matter, you might be better off using > `cl-defstruct` instead, which is much more lightweight and will likely > serve you just as well here. Very good to know! I was originally wavering between eieio objects and structs, and didn't have a very compelling reason to end up with objects, except I thought we could "probably use" the extra functionality at some point. But speed is most definitely a concern, and totally outweighs any hypothetical future usefulness of objects. I'll go with structs. Thanks, Eric