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: Run `M-x list-input-methods` and then scroll down the screen in input method panel using the mouse or arrow key will cause Emacs unresponsive for about 1 minite. Date: Sat, 19 Jun 2021 14:00:27 +0300 Message-ID: <83r1gyw244.fsf@gnu.org> References: <837diqxty3.fsf@gnu.org> <8335texrxf.fsf@gnu.org> <83wnqqw69t.fsf@gnu.org> <83v96aw4ql.fsf@gnu.org> <83tuluw3fn.fsf@gnu.org> <83sg1ew2bs.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38569"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: hongyi.zhao@gmail.com Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Jun 19 13:01:23 2021 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 1luYj5-0009q6-Hj for ged-emacs-devel@m.gmane-mx.org; Sat, 19 Jun 2021 13:01:23 +0200 Original-Received: from localhost ([::1]:46580 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1luYj3-0002Xo-Hy for ged-emacs-devel@m.gmane-mx.org; Sat, 19 Jun 2021 07:01:21 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:49750) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1luYi1-0001le-U3 for emacs-devel@gnu.org; Sat, 19 Jun 2021 07:00:17 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:33678) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1luYi1-0000l7-M2; Sat, 19 Jun 2021 07:00:17 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4461 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 1luYi1-0006rj-5n; Sat, 19 Jun 2021 07:00:17 -0400 In-Reply-To: <83sg1ew2bs.fsf@gnu.org> (message from Eli Zaretskii on Sat, 19 Jun 2021 13:55:51 +0300) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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:270941 Archived-At: > Date: Sat, 19 Jun 2021 13:55:51 +0300 > From: Eli Zaretskii > Cc: emacs-devel@gnu.org > > The fast version is an optimized build, the slow one is unoptimized. > That explains at least part of the slowness. The fast version also > doesn't include any text-shaping engine, which might speed up Emacs, > but prevents it from correctly displaying complex scripts. > > What are the Emacs versions of the two builds? Sorry, I see now that its Emacs 26.3 and 28. And I guess the Emacs 28 build also used the default optimization options, unlike what I said before. So the only difference I see is the text-shaping engine that is missing in the "fast" version. I don't think I understand why that should have such a profound effect on the speed of finding fonts, sorry.