From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: New optimisations for long raw strings in C++ Mode. Date: Sun, 07 Aug 2022 15:34:45 +0200 Message-ID: <87fsi818ju.fsf@gnus.org> References: <87r11s2p7f.fsf@gnus.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="28101"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Aug 07 15:36:18 2022 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 1oKgS1-00077K-Nb for ged-emacs-devel@m.gmane-mx.org; Sun, 07 Aug 2022 15:36:17 +0200 Original-Received: from localhost ([::1]:44660 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oKgS0-0000DV-Ke for ged-emacs-devel@m.gmane-mx.org; Sun, 07 Aug 2022 09:36:16 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50602) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKgQg-0007og-KH for emacs-devel@gnu.org; Sun, 07 Aug 2022 09:34:54 -0400 Original-Received: from quimby.gnus.org ([2a01:4f9:2b:f0f::2]:46884) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oKgQf-0000tK-8F for emacs-devel@gnu.org; Sun, 07 Aug 2022 09:34:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:Date:References: In-Reply-To:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=1v2xkQN1hNpJ9xUSQ/H0EIF7BmXd75S9I4bAXxmz2Oo=; b=gEAQUtVL7JGVANgaS1f9hDhyFV CBYMLTglMVjQgPNXInoGUpYW0/Eap7aUKkyvqGthDXR8r+58wbyRh7UFAtifKVXyu+iH5bn67DDVD GW3TrSx+tUe+nJpXe+qkYl4FdvdYf43o40gpJmm1yKHgKxbJaAZEZ5oUMQXSkl9LwMio=; Original-Received: from [84.212.220.105] (helo=joga) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oKgQY-0006xg-3a; Sun, 07 Aug 2022 15:34:48 +0200 In-Reply-To: (Alan Mackenzie's message of "Sun, 7 Aug 2022 13:25:26 +0000") Received-SPF: pass client-ip=2a01:4f9:2b:f0f::2; envelope-from=larsi@gnus.org; helo=quimby.gnus.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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:293202 Archived-At: Alan Mackenzie writes: > Hmm. Something is different on my setup from yours. After my > optimisations, I do: Is this on the current trunk? > (i) Emacs -Q > (ii) M-: (setq long-line-threshold nil) > (ii) C-x C-f ~/long-line.cc RET; This is a file containing a 1MB raw > string. > (iii) This loads and displays in somewhere between 1 and 2 seconds. > (iv) C-x 5 b long-line2.cc RET M-x c++-mode RET > (v) Type in char long_line [] = R"foo( > (vi) Type in RET, twice > (vii) Type in )foo"; Yup. > (ix) C-x 5 o > (x) Get the long line into the kill ring, with movement commands and > M-w. > (xi) C-x 5 o. > (xii) Put point on the blank line 2. > (xiii) C-y. > (xiv) This takes less than a second to display. It's still hanging for me after 20s. > What does your 1MB string look like? Does it contain lots of "s? CC > Mode needs to search through the yanked line for the first occurrence of > )foo", which is why it is not instantaneous. It also has to put a > syntax-table text property on each " which isn't the terminating )foo", > which is another reason it's not instantaneous. The string I'm yanking is just 1MB worth of x and y characters (and no spaces or anything).