From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: 'struct window' cleanup #2 Date: Wed, 27 Jun 2012 06:03:52 +0300 Message-ID: <83lij98nhj.fsf@gnu.org> References: <4FE827B6.6020306@yandex.ru> <4FE89369.2000708@gmx.at> <4FE896A9.3090002@yandex.ru> <4FE9643C.1090201@gmx.at> <83a9zq9jhp.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: dough.gmane.org 1340766228 18109 80.91.229.3 (27 Jun 2012 03:03:48 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 27 Jun 2012 03:03:48 +0000 (UTC) Cc: rudalics@gmx.at, dmantipov@yandex.ru, emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Jun 27 05:03:47 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1SjiXi-0000Iz-Az for ged-emacs-devel@m.gmane.org; Wed, 27 Jun 2012 05:03:46 +0200 Original-Received: from localhost ([::1]:55885 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SjiXi-0000vq-BA for ged-emacs-devel@m.gmane.org; Tue, 26 Jun 2012 23:03:46 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:47357) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SjiXf-0000vZ-Ng for emacs-devel@gnu.org; Tue, 26 Jun 2012 23:03:44 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SjiXe-00018X-3B for emacs-devel@gnu.org; Tue, 26 Jun 2012 23:03:43 -0400 Original-Received: from mtaout21.012.net.il ([80.179.55.169]:43561) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SjiXd-00018F-Ru for emacs-devel@gnu.org; Tue, 26 Jun 2012 23:03:42 -0400 Original-Received: from conversion-daemon.a-mtaout21.012.net.il by a-mtaout21.012.net.il (HyperSendmail v2007.08) id <0M6900M009PWU700@a-mtaout21.012.net.il> for emacs-devel@gnu.org; Wed, 27 Jun 2012 06:03:40 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.210.75]) by a-mtaout21.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0M6900M3P9U3U010@a-mtaout21.012.net.il>; Wed, 27 Jun 2012 06:03:40 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-Received-From: 80.179.55.169 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:151206 Archived-At: > From: Stefan Monnier > Cc: martin rudalics , dmantipov@yandex.ru, emacs-devel@gnu.org > Date: Tue, 26 Jun 2012 20:42:37 -0400 > > >> Anyway, window_end_pos and window_end_vpos are the more > >> promising candidates (if Eli agrees). > > I don't object. But if we think that Lisp integers cause any > > significant slowdown during GC > > For me, the reason to make such changes is to make the code simpler and > more robust: by avoiding conversion to/from Lisp_Object we get to use > more of C's type checks (as weak as they are, they're better than > nothing). > And for objects which are always integers, the code ends up simpler. > If it's more efficient, that's just a nice side-effect. As I said, I don't object. I was responding to what seemed to be Dmitry's main motivation: make GC consume less resources.