From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: [PATCH] Re: cc-mode fontification feels random Date: Mon, 30 Aug 2021 16:11:18 -0400 Message-ID: References: <835yvmka50.fsf@gnu.org> <9377d9ec-a3e5-ceea-8a9a-523a420f13f7@dancol.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16276"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Eli Zaretskii , Alan Mackenzie , emacs-devel@gnu.org To: Daniel Colascione Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Aug 30 22:13:39 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 1mKnf0-0003zc-NI for ged-emacs-devel@m.gmane-mx.org; Mon, 30 Aug 2021 22:13:38 +0200 Original-Received: from localhost ([::1]:46334 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mKney-0000rR-NX for ged-emacs-devel@m.gmane-mx.org; Mon, 30 Aug 2021 16:13:36 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34154) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mKncs-0007w1-LD for emacs-devel@gnu.org; Mon, 30 Aug 2021 16:11:30 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:54882) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mKncp-0000l9-PS; Mon, 30 Aug 2021 16:11:25 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id E47BB80904; Mon, 30 Aug 2021 16:11:20 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 9A31E80272; Mon, 30 Aug 2021 16:11:19 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1630354279; bh=o7MdoViXDHfm/rQp1YUIXxC6LFNHpGvhOe5ecHbqF6E=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=AmZPOk6leGzmdMhKsAKQYVG5WXWKlQTk6ANkvz2fF+47j23/ZzjFYNjJUIIxqqgb7 121VScHK6eTZDjRULjNiRdu2zR9P/+PwmX4tQWJpLjjMpwVn/gyewORqQ/tce4i4ZX zPsO0d7eGMwP43IQp64TfOjN9NSpfCkOInwCx+4U3olg2xs81/ls1pwbdBnb2qPaF2 8++pBl/FzeuYG0A8jaidwvjImKwFVpfbvBn5GYjAETA5+kEiW4ZdFPKl0JZq+q4yrQ WRnSSMVKC15RyxjznIfr5AUi8UnH9iaT+P0gy9VOb6AAg6cSS7/1SXslQho3T8c7RA 3PhmtgPMmM4ug== Original-Received: from alfajor (unknown [104.247.244.135]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 5C1E812046B; Mon, 30 Aug 2021 16:11:19 -0400 (EDT) In-Reply-To: <9377d9ec-a3e5-ceea-8a9a-523a420f13f7@dancol.org> (Daniel Colascione's message of "Mon, 30 Aug 2021 12:28:01 -0700") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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:273549 Archived-At: > Because good defaults matter, and if we have proper input preemption of > stealth JIT working, there should be no downside. `jit-lock-stealth-time` defaults to nil (i.e. stealth fontification is disabled by default) for a good reason: it used to be enabled. The known downsides are: - we don't have good input preemption - it eats up your battery with no clear benefit [ Because you end up re-fontifying the whole rest of the buffer after every buffer modification. ] If we want to keep the buffers fully fontified, then it's crucial to make sure every tiny buffer modification doesn't force re-fontifying most of the rest of the buffer. Stefan