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#69385: 30.0.50; Long lines with bidi text slow down Emacs Date: Mon, 26 Feb 2024 17:52:50 +0200 Message-ID: <86r0gzusrx.fsf@gnu.org> References: <878r381pjk.fsf@gmx.net> <86msrowk0g.fsf@gnu.org> <87zfvozaj7.fsf@gmx.net> <86edd0wdbs.fsf@gnu.org> <87r0h0z3fl.fsf@gmx.net> <868r37wgkx.fsf@gnu.org> <87zfvnfh4d.fsf@gmx.net> <86v86bux3w.fsf@gnu.org> <86ttlvuwxo.fsf@gnu.org> <87r0gzfe5a.fsf@gmx.net> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15398"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 69385@debbugs.gnu.org To: Stephen Berman Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Feb 26 17:20:56 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 1redip-0003nC-RZ for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 26 Feb 2024 17:20:55 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rediY-0006eO-Vs; Mon, 26 Feb 2024 11:20:39 -0500 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 1rediX-0006dK-0w for bug-gnu-emacs@gnu.org; Mon, 26 Feb 2024 11:20:37 -0500 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rediW-0000OO-BH for bug-gnu-emacs@gnu.org; Mon, 26 Feb 2024 11:20:36 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1rediv-0007wK-Kj for bug-gnu-emacs@gnu.org; Mon, 26 Feb 2024 11:21:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 26 Feb 2024 16:21:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 69385 X-GNU-PR-Package: emacs Original-Received: via spool by 69385-submit@debbugs.gnu.org id=B69385.170896442530394 (code B ref 69385); Mon, 26 Feb 2024 16:21:01 +0000 Original-Received: (at 69385) by debbugs.gnu.org; 26 Feb 2024 16:20:25 +0000 Original-Received: from localhost ([127.0.0.1]:47261 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1rediK-0007u7-Qe for submit@debbugs.gnu.org; Mon, 26 Feb 2024 11:20:25 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:47736) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1rediD-0007tW-Cd for 69385@debbugs.gnu.org; Mon, 26 Feb 2024 11:20:23 -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 1redI8-0003dN-Se; Mon, 26 Feb 2024 10:53:20 -0500 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=5742KFMdIkcG5dDulWuiwflcekGk+Rm8mSL3Hgd+gPI=; b=KLYFFJCOSeGS /WFsLSEPmRruu679dMuqlUffMGDonAzBjLqfrqyK/7a8H3apB50sPs2oGBv3pWQWhE2pdH05SS6iW HBvpWl6khDcCV0PKxrxSjEjb6QnDZY18ZjOTPgTEjhMD+pAhBQUSELT98PHNfNkafJ2r20rFe8ATB MLVtyaNHMq/PZY66QANYl9GuX61zVC+QZ26q9UbtAFMjz80weaLduFB3yC/yJc6ndfbe07jfOWOxy Jspx/y+5flN+9SVHI8x0J53S/hBvM5pBl5pV6NrRzDsdkW9UurYeb/Des9zqYQMO4VFPIPfSToTRL Bxj0zijeKQ0iLtaQnPlo1Q==; In-Reply-To: <87r0gzfe5a.fsf@gmx.net> (message from Stephen Berman on Mon, 26 Feb 2024 16:17:53 +0100) 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:280680 Archived-At: > From: Stephen Berman > Cc: 69385@debbugs.gnu.org > Date: Mon, 26 Feb 2024 16:17:53 +0100 > > On Mon, 26 Feb 2024 16:22:59 +0200 Eli Zaretskii wrote: > > >> Cc: 69385@debbugs.gnu.org > >> Date: Mon, 26 Feb 2024 16:19:15 +0200 > >> From: Eli Zaretskii > >> > >> > From: Stephen Berman > >> > Cc: 69385@debbugs.gnu.org > >> > Date: Mon, 26 Feb 2024 15:13:38 +0100 > >> > > >> > On Mon, 26 Feb 2024 14:33:18 +0200 Eli Zaretskii wrote: > >> > > >> > > The CPU is fast. My HarfBuzz version is much older, but I doubt that > >> > > HarfBuzz became so much slower for Arabic. So it's very strange. But > >> > > maybe it's worth to try downgrading to an earlier version, just to be > >> > > sure this is not the culprit? > >> > > >> > That's not so straightforward on this system, where I build system > >> > packages from source, so downgrading HarfBuzz may require also > >> > rebuilding packages that depend on it. I have a somewhat older system > >> > on this machine with HarfBuzz 7.1.0, so I can easily try that. What > >> > version of HarfBuzz are you using? > >> > >> I have 2.4.0 here. > > > > Btw, another possibility could be that this is specific to the Cairo > > build. So maybe try a build without Cairo. > > I did, and the slowdown seems just as bad as in the build with Cairo. Can you try the emacs-29 branch?