From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yuri D'Elia Newsgroups: gmane.emacs.devel Subject: cc-mode: recent performance issues? Date: Tue, 09 Nov 2021 17:42:48 +0100 Message-ID: <87mtmd1drr.fsf@wavexx.thregr.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33806"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: emacs-devel@gnu.org Cancel-Lock: sha1:+2qlumguqKtTrZWaPOrN2DlG5Uw= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Nov 09 17:45:10 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 1mkUFC-0008ev-MZ for ged-emacs-devel@m.gmane-mx.org; Tue, 09 Nov 2021 17:45:10 +0100 Original-Received: from localhost ([::1]:35134 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mkUFB-0007ml-Gg for ged-emacs-devel@m.gmane-mx.org; Tue, 09 Nov 2021 11:45:09 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:53460) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkUD9-0006PT-2d for emacs-devel@gnu.org; Tue, 09 Nov 2021 11:43:03 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:47526) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkUD4-00089K-Sa for emacs-devel@gnu.org; Tue, 09 Nov 2021 11:43:01 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mkUD1-0005ms-H9 for emacs-devel@gnu.org; Tue, 09 Nov 2021 17:42:55 +0100 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=ged-emacs-devel@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 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:279111 Archived-At: --=-=-= Content-Type: text/plain I noticed a relatively recent performance issue in cc-mode. Try opening the following attached file, which is a random c++ piece of code containing some template-heavy function repeated multiple times. In emacs -q -nw, try to scroll down a bit, then up. Emacs gets busy in a display loop. Under x11/lucid (emacs/lucid with NATIVE_FULL_AOT=1), it's a bit more responsive at first, but still gets stuck in the display loop to the point of being unusable after a few seconds. --=-=-= Content-Type: application/gzip Content-Disposition: attachment; filename=test.hpp.gz Content-Transfer-Encoding: base64 H4sICH+aimEAA3Rlc3QuaHBwAO2RsQqDMBiEd5/iRoWAnW0qqOAL1D6AjakIMQk1Fov47jUBnUpL l07JEkju7s/lY6IeBhSYAz1eRceSAOuK4zeb4b0WteGg5qk5MgKWJBfkqbtlSg6GT/qOh+oanFXP Kz6YUoZWJTtDhZItGrWO4QQ5gU1JMRFndxFfhHbGrWs/q3DCjAOWaK20BW+PqRTN0nA/3kuVoyxq IajVFfZDXENiK7rUNJwi8ldbdHS+JfA4PA6Pw+PwODyOX3EswQtJ4f/R3gcAAA== --=-=-=--