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: Major modes using `widen' is a good, even essential, programming practice. Date: Sun, 07 Aug 2022 21:37:10 +0300 Message-ID: <83lerzx5m1.fsf@gnu.org> References: <6ae35c9306ade07b4c45@heytings.org> <835yj4xhh7.fsf@gnu.org> <83y1w0w0gk.fsf@gnu.org> <83pmhcvugm.fsf@gnu.org> <651cad2f-3ce3-22dd-0829-38dd3c46ec40@yandex.ru> <83o7wwvsqf.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21442"; mail-complaints-to="usenet@ciao.gmane.io" Cc: acm@muc.de, gregory@heytings.org, emacs-devel@gnu.org To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Aug 07 20:38:23 2022 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 1oKlAM-0005Qd-Qf for ged-emacs-devel@m.gmane-mx.org; Sun, 07 Aug 2022 20:38:23 +0200 Original-Received: from localhost ([::1]:59022 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oKlAL-00068A-AC for ged-emacs-devel@m.gmane-mx.org; Sun, 07 Aug 2022 14:38:21 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35484) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKl9S-0005RL-JN for emacs-devel@gnu.org; Sun, 07 Aug 2022 14:37:26 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:58962) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKl9R-00027Q-JH; Sun, 07 Aug 2022 14:37:25 -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=BIWIoMyb/ylHzLBXNjR0IUL7kclhAqW+8hCARWvXa3A=; b=Lw4ZYC5DT3A3 L0bh65czEmtLg79Bf4rcxW19S8RGBlV8dbx/R8fLsTc1lOTKdgfa2e240hj0/hbI1eh4G3SFkcgrJ eisCPGTM/5C/XKQc4T57ahWJNw01uztP0umSGRo1C2GVHKVEV3nFLzhsaSSBkxFS5aAlK1dayJYqi lWrEM6+32CQHUxxs4XBK2GUxQvw9zUVA5bOSE4FhLekZV9D/bOpVCeubg/neVCLJekTE/cxhkBz0d EwUg6Z/C1oWgTthdcdMvT6uddtnxq9PgrVZxkA/VFi5EmcE8ooiDAStvSETaxuz9sBD7f969Yk6FA y8MI48KTrL7iqPTCINSpMQ==; Original-Received: from [87.69.77.57] (port=3086 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKl9R-00050V-2e; Sun, 07 Aug 2022 14:37:25 -0400 In-Reply-To: (message from Dmitry Gutov on Sun, 7 Aug 2022 21:05:44 +0300) 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" Xref: news.gmane.io gmane.emacs.devel:293226 Archived-At: > Date: Sun, 7 Aug 2022 21:05:44 +0300 > Cc: acm@muc.de, gregory@heytings.org, emacs-devel@gnu.org > From: Dmitry Gutov > > >> reports 20-50 ms on my machine. > > It takes 0.5 sec here. > > Interesting. That would mean that scrolling to the end of xdisp.c will > at least take this long the first time around. > > The more than 10x difference in performance is weird, though. Perhaps > you have any ideas why parse-partial-sexp's implementation might behave > poorly on your un-optimized build? Some tweak in the code might make a > lot of difference. I hope Stefan could do something about it.