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.bugs Subject: bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file Date: Thu, 14 Nov 2024 12:06:41 +0200 Message-ID: <86ldxmjfim.fsf@gnu.org> References: <8734k0cs1u.fsf@subvertising.org> <86zfm2jjbo.fsf@gnu.org> <87frnu2mar.fsf@subvertising.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7099"; mail-complaints-to="usenet@ciao.gmane.io" Cc: monnier@iro.umontreal.ca, 74281@debbugs.gnu.org To: Divya Ranjan Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Nov 14 11:07:12 2024 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1tBWkp-0001g0-V5 for geb-bug-gnu-emacs@m.gmane-mx.org; 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Thu, 14 Nov 2024 05:06:51 -0500 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 1tBWkP-0008Pv-Mb; Thu, 14 Nov 2024 05:06:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=aH5y4tX+hLIjEOJgz1b7lzLkabW8SSnJUG23akVSonA=; b=SvAfkhuM6mVJNGWuNvWT hEy6YwgVJLTDBiyMVYdFo2knyO3Btb6TTidVNZTtu8gByYDNgJgot+tWZyn0conoJkUI7a2+rllu2 /wMOs/B4rmwwhHHGF3p0+KrzpJSXZubR9vRzdhd+mkrgLejx6a7QlbED5IY9pCtpyqE5PzxcOzNpl J1eogmQGMC3Kv5SNW7moLsfA97d8cyoRN+Sf0DUkip2YZ2zk4IMkZtNk/d7VWpia5Uqyq5JDzuauz SIUzj8tyY9nWI1mPB33YqJobSPRmPsMZJIT9UHMB6fdrk+LDgfaGv2/AKRLUaR/cykLscQuRFCvLK CsLqpmnpgRXngQ==; In-Reply-To: <87frnu2mar.fsf@subvertising.org> (message from Divya Ranjan on Thu, 14 Nov 2024 09:32:12 +0000) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:295326 Archived-At: > From: Divya Ranjan > Cc: Stefan Monnier , 74281@debbugs.gnu.org > Date: Thu, 14 Nov 2024 09:32:12 +0000 > > Hello, Eli > > Eli Zaretskii writes: > > >> Date: Sat, 09 Nov 2024 16:04:13 +0000 > >> From: Divya Ranjan via "Bug reports for GNU Emacs, > >> the Swiss army knife of text editors" > >> > >> > >> 1. In emacs -Q, open a fairly big Scheme file (> 70k) and try to move in > >> the file with C-n, C-f or mouse scrolling. It sverely lags for several > >> seconds, doesn’t even respond to C-g. > > > > I can only reproduce this with C-p when moving from the end of the > > file. C-n and C-f are instantaneous here, even though this is an > > unoptimized build of Emacs 30. > > I see, well its the latest build of emacs on GNU Guix, so yeah. Which lacking features in particular do you think might be causing this? I don't understand the question: I thought I pointed at the possible cause by mentioning syntax-directed font lock?