From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#29846: scroll and fontify takes longer time for file in slow network Date: Mon, 25 Dec 2017 18:48:18 +0200 Message-ID: <83o9mmiwj1.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1514220440 9548 195.159.176.226 (25 Dec 2017 16:47:20 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 25 Dec 2017 16:47:20 +0000 (UTC) Cc: 29846@debbugs.gnu.org To: Shuguang Sun Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Dec 25 17:47:15 2017 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eTVuF-000239-JV for geb-bug-gnu-emacs@m.gmane.org; Mon, 25 Dec 2017 17:47:15 +0100 Original-Received: from localhost ([::1]:54492 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eTVwC-0008V0-Qa for geb-bug-gnu-emacs@m.gmane.org; Mon, 25 Dec 2017 11:49:16 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55900) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eTVw1-0008TQ-Vo for bug-gnu-emacs@gnu.org; Mon, 25 Dec 2017 11:49:06 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eTVvy-0000tL-3O for bug-gnu-emacs@gnu.org; Mon, 25 Dec 2017 11:49:06 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:43326) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eTVvx-0000tD-VT for bug-gnu-emacs@gnu.org; Mon, 25 Dec 2017 11:49:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1eTVvx-0006Qu-J7 for bug-gnu-emacs@gnu.org; Mon, 25 Dec 2017 11:49:01 -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, 25 Dec 2017 16:49:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 29846 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 29846-submit@debbugs.gnu.org id=B29846.151422050524687 (code B ref 29846); Mon, 25 Dec 2017 16:49:01 +0000 Original-Received: (at 29846) by debbugs.gnu.org; 25 Dec 2017 16:48:25 +0000 Original-Received: from localhost ([127.0.0.1]:52007 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eTVvN-0006Q6-4C for submit@debbugs.gnu.org; Mon, 25 Dec 2017 11:48:25 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:36262) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eTVvL-0006Pv-KM for 29846@debbugs.gnu.org; Mon, 25 Dec 2017 11:48:23 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eTVvC-0000Xy-Hf for 29846@debbugs.gnu.org; Mon, 25 Dec 2017 11:48:18 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:43607) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eTVvC-0000XS-E9; Mon, 25 Dec 2017 11:48:14 -0500 Original-Received: from [176.228.60.248] (port=2590 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1eTVv9-0001if-06; Mon, 25 Dec 2017 11:48:11 -0500 In-reply-to: (message from Shuguang Sun on Mon, 25 Dec 2017 17:47:52 +0800) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:141490 Archived-At: > From: Shuguang Sun > Date: Mon, 25 Dec 2017 17:47:52 +0800 > > Backup, auto-save, and lockfiles has been disabled in .dir-locals > > ((nil > (make-backup-files . nil) > (create-lockfiles . nil) > (auto-save-default . nil) > (auto-save-timeout . 10000) > )) You've disabled file locking, but Emacs still checks whether some other Emacs session locked the file. It does that as part of restore-buffer-modified-p, which is called by JIT font-lock (because fontification makes the buffer modified and JIT font-lock needs to undo that after it fontifies a chunk of buffer). Checking whether a file is locked entails calling unlock_file, which in turn calls read_lock_data, which tries to open the lock file. I'm guessing that this is slow on that remote volume of yours. Maybe we should support a special value of create-lockfiles which would mean don't create lockfiles and don't test fro lockfiles created by other Emacs sessions.