From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Guido Kraemer Newsgroups: gmane.emacs.bugs Subject: bug#33708: 26.1.90; nhexl-mode performance Date: Tue, 11 Dec 2018 18:06:40 +0100 Message-ID: <8d6352ac-4bca-fb76-8c2f-dd597e481e8e@bgc-jena.mpg.de> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1544548182 20219 195.159.176.226 (11 Dec 2018 17:09:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 11 Dec 2018 17:09:42 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 To: 33708@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Dec 11 18:09:37 2018 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 1gWlXL-00058J-Bv for geb-bug-gnu-emacs@m.gmane.org; Tue, 11 Dec 2018 18:09:35 +0100 Original-Received: from localhost ([::1]:40330 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gWlZS-0000j8-5k for geb-bug-gnu-emacs@m.gmane.org; Tue, 11 Dec 2018 12:11:46 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53105) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gWlVu-0006SY-Bt for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:08:08 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gWlVq-0003Ge-4Z for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:08:06 -0500 Original-Received: from debbugs.gnu.org ([208.118.235.43]:39858) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gWlVq-0003GQ-0D for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:08:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1gWlVp-0000i0-Pl for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:08:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Guido Kraemer Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 11 Dec 2018 17:08:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 33708 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.15445480382665 (code B ref -1); Tue, 11 Dec 2018 17:08:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 11 Dec 2018 17:07:18 +0000 Original-Received: from localhost ([127.0.0.1]:44116 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gWlV7-0000gv-Jz for submit@debbugs.gnu.org; Tue, 11 Dec 2018 12:07:17 -0500 Original-Received: from eggs.gnu.org ([208.118.235.92]:43163) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gWlV6-0000gh-LR for submit@debbugs.gnu.org; Tue, 11 Dec 2018 12:07:17 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gWlUw-0002ai-EN for submit@debbugs.gnu.org; Tue, 11 Dec 2018 12:07:11 -0500 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:60486) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gWlUw-0002aa-Av for submit@debbugs.gnu.org; Tue, 11 Dec 2018 12:07:06 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52756) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gWlUu-0005J1-0Y for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:07:06 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gWlUp-0002V4-PN for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:07:03 -0500 Original-Received: from altona.bgc-jena.mpg.de ([195.37.229.22]:55572) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gWlUp-0002TP-GN for bug-gnu-emacs@gnu.org; Tue, 11 Dec 2018 12:06:59 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by altona.bgc-jena.mpg.de (GATE -B2013- / MPI BGC Mail System) with ESMTP id 6870F1A362 for ; Tue, 11 Dec 2018 18:06:55 +0100 (CET) X-Virus-Scanned: amavisd-new at bgc-jena.mpg.de Original-Received: from altona.bgc-jena.mpg.de ([127.0.0.1]) by localhost (bermuda.bgc-jena.mpg.de [127.0.0.1]) (amavisd-new, port 10024) with LMTP id o1Uj2NDVAV66 for ; Tue, 11 Dec 2018 18:06:49 +0100 (CET) Original-Received: from [192.168.2.100] (dslb-002-203-190-066.002.203.pools.vodafone-ip.de [2.203.190.66]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by altona.bgc-jena.mpg.de (GATE -B2013- / MPI BGC Mail System) with ESMTPSA id 170941A360 for ; Tue, 11 Dec 2018 18:06:49 +0100 (CET) Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x 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:153359 Archived-At: Filing a bug report because of the discussion on https://emacs.stackexchange.com/questions/46492/how-to-search-for-a-sequence-of-bytes-in-hexl-mode/ nhexl-mode performance is really bad in large files. Occurred in the files of the Bitcoin blockchain. The beginning of every block is marked with the byte sequence `f9beb4d9`. Searching for this byte sequence in nhexl-mode is really slow. In case you do not have the bitcoin client installed, I uploaded the first file of the blockchain here (134MB, link will be valid for 30 days): https://ufile.io/z08bl Thanks for looking into this. Guido. In GNU Emacs 26.1.90 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw scroll bars) of 2018-12-01 built on uranus Repository revision: 7851ae8b443c62a41ea4f4440512aa56cc87b9b7 Windowing system distributor 'The X.Org Foundation