From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Debouncing slow mode line constructs (was: Emacs design and architecture. How about copy-on-write?) Date: Fri, 22 Sep 2023 17:41:59 +0300 Message-ID: <83sf765ky0.fsf@gnu.org> References: <83y1h1axtq.fsf@gnu.org> <87sf79rq5o.fsf@yahoo.com> <83fs38c2yv.fsf@gnu.org> <83o7hw9ee1.fsf@gnu.org> <87il84q845.fsf@yahoo.com> <83il849bx6.fsf@gnu.org> <87a5tfri8c.fsf@yahoo.com> <878r8z27cs.fsf@localhost> <44e98df7-f683-ac07-e644-40757f1d26f9@gutov.dev> <87msxfzts6.fsf@localhost> <7b0c07f5-88c8-4f2c-6ac6-a6112c884f32@gutov.dev> <87il83zsg1.fsf@localhost> <87fs37zrjx.fsf@localhost> <83ttrn8woc.fsf@gnu.org> <87h6nmy098.fsf@localhost> <83h6nm76mv.fsf@gnu.org> <87r0mqweba.fsf@localhost> <83zg1e5pd8.fsf@gnu.org> <87fs36wdjl.fsf@localhost> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18102"; mail-complaints-to="usenet@ciao.gmane.io" Cc: dmitry@gutov.dev, luangruo@yahoo.com, acm@muc.de, incal@dataswamp.org, emacs-devel@gnu.org To: Ihor Radchenko Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Sep 22 16:42:49 2023 Return-path: Envelope-to: ged-emacs-devel@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 1qjhMn-0004UG-5c for ged-emacs-devel@m.gmane-mx.org; Fri, 22 Sep 2023 16:42:49 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qjhLu-0008FJ-LQ; Fri, 22 Sep 2023 10:41:54 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qjhLt-0008F8-BA for emacs-devel@gnu.org; Fri, 22 Sep 2023 10:41:53 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qjhLr-0006gj-FH; Fri, 22 Sep 2023 10:41:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=ar7TCGgVpPfAcBzrxQsxmvoY959RtCZF/wlki482uZI=; b=pk9llfvwAFBd pRZ6vA6Gnh2KyDGHbba+vq3rZWLxfZIVlWD9Ip0Mo2dPznL5bpWCNvQ8qzLrpKQdUbe99t1tmFPpA UbddDW37PBeD7jOOVpERM232tfs8qv0Ug54umJqfuaruHYxaHCKVaT9yNEaBdrdt0gJXXjSFOWNFz CJ8AS+RwTv0LWMm0QvG3EQCIX4kIl4zclHbiDANpMtXD17OZWjE0CoHTTbth9ZxjuVSl02D8tRZW8 39pCeLLa5MjHO7U13eag2pEWcITQbhY0fnJP6/ZwMDgGLBCMqj0bUoU1PGC4nrndTW7xQ7tHksONk IkrRcz3ZQ+v7T3GgybvZ5g==; In-Reply-To: <87fs36wdjl.fsf@localhost> (message from Ihor Radchenko on Fri, 22 Sep 2023 13:19:42 +0000) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:310970 Archived-At: > From: Ihor Radchenko > Cc: dmitry@gutov.dev, luangruo@yahoo.com, acm@muc.de, incal@dataswamp.org, > emacs-devel@gnu.org > Date: Fri, 22 Sep 2023 13:19:42 +0000 > > Eli Zaretskii writes: > > >> redisplay optimizations may decide to not refresh the mode-line when > >> typing. > > > > If they do, it's a bug. > > You are right. Typing appears to trigger mode-line redisplay. > What I thought is a redisplay optimization is different - `vc-mode' > variable used to display VC status is not updated on every redisplay. > Instead, it is modified when visiting a file and when saving a file. > The end result is the same - VC status is not always up-to-date. > > Similar approach is often used by other well-optimized mode-line > constructs, leading to sometimes-outdated mode-line. These are not problems with display, these are problems with the modes which define and calculate the respective mode-line variables.