From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings Newsgroups: gmane.emacs.devel Subject: Re: Speedup of display of long and truncated lines Date: Sat, 13 Aug 2022 15:52:56 +0000 Message-ID: <66bbbb95989005dd3e92@heytings.org> References: <83edxkmdy3.fsf@gnu.org> <66bbbb9598b1b1ce66d2@heytings.org> <8335e0m9zp.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="40618"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Aug 13 18:20:56 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 1oMtse-000AIh-91 for ged-emacs-devel@m.gmane-mx.org; Sat, 13 Aug 2022 18:20:56 +0200 Original-Received: from localhost ([::1]:54560 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oMtsc-00014P-VI for ged-emacs-devel@m.gmane-mx.org; Sat, 13 Aug 2022 12:20:54 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55420) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oMtRc-0001mk-Lo for emacs-devel@gnu.org; Sat, 13 Aug 2022 11:53:00 -0400 Original-Received: from heytings.org ([95.142.160.155]:49642) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oMtRb-0000ca-59; Sat, 13 Aug 2022 11:53:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1660405976; bh=5b5ymUec7H055fdCKOQtKVIW9f3aOlgdyZpuGndTzis=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=o/18aQuD/+Rb+L205a4XoHPIwZ2FbgHz3mjFvxqawmVpsKU15LIoHvJTdXFIapt7D cqCclDgXNC/7cHS3KqpPCjIrItrQoQHoYJ77oiFxyOLejQ0bOZhJK+22cRpYSY00ad iUNXO2ZZL5/VrHkAvPx7bUOhIEoJnvjGyphaSCUNGM+ph36ncRvWLox44RfJg48ba0 wONNXGhng67rLFW3extY1LLnj9MxnLbxxlLiOxVZ8rGGvG/K9WRo9H53qyGOmvGoYc E+JhR32v9+ufjbUAX6DHeC+LnP6axTR4fUB2tIYr4PmYXUK27skDr29Dxv1GGjf3/U /wPvbU0T/+BgA== In-Reply-To: <8335e0m9zp.fsf@gnu.org> Received-SPF: pass client-ip=95.142.160.155; envelope-from=gregory@heytings.org; helo=heytings.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, SPF_HELO_PASS=-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:293425 Archived-At: >>> I didn't yet look at C-v/M-v, mainly because I don't have examples of >>> files with long lines that have enough long lines to justify movement >>> by window-full. (I could, of course, produce such files myself, but >>> the question is: do such files exist in Real Life, enough to make the >>> scrolling commands important in these cases? Examples of such files, >>> if they exist, are welcome.) >> >> Yes, such files exist in Real Life. An example are database dumps, in >> which you can have hundreds of very long lines. > > Thanks, I'd appreciate any pointers to where I could download examples > of such files. > I cannot share such an example myself alas, the real-life databases I have access to contain business-sensitive data. But you can easily create a similar file with the following script. Its two parameters are the number of tables in the database and the number of elements in each table. 100 and 10000 are a good starting point (for what is still a small database). #!/bin/bash for i in $(seq 1 $1) do echo -n "INSERT INTO TABLE_$i VALUES " for j in $(seq 1 $2) do echo -n "(10,'100','QWERTY','Foo Bar Baz',50,4852,$j)" (($j == $2)) && echo -n ';' || echo -n ',' done echo done