From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Dan Nicolaescu Newsgroups: gmane.emacs.devel Subject: slow output in *compilation* buffer Date: Sat, 22 Aug 2009 01:23:10 -0700 (PDT) Message-ID: <200908220823.n7M8NAk5028199@godzilla.ics.uci.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1250929517 1974 80.91.229.12 (22 Aug 2009 08:25:17 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 22 Aug 2009 08:25:17 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Aug 22 10:25:10 2009 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1MeluP-0002uE-F0 for ged-emacs-devel@m.gmane.org; Sat, 22 Aug 2009 10:25:09 +0200 Original-Received: from localhost ([127.0.0.1]:54306 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MeluO-0007zZ-TC for ged-emacs-devel@m.gmane.org; Sat, 22 Aug 2009 04:25:08 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MeluE-0007wG-3b for emacs-devel@gnu.org; Sat, 22 Aug 2009 04:24:58 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Melu9-0007u6-1m for emacs-devel@gnu.org; Sat, 22 Aug 2009 04:24:57 -0400 Original-Received: from [199.232.76.173] (port=54973 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Melu8-0007tq-84 for emacs-devel@gnu.org; Sat, 22 Aug 2009 04:24:52 -0400 Original-Received: from sallyv2.ics.uci.edu ([128.195.1.120]:51832) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_3DES_EDE_CBC_SHA1:24) (Exim 4.60) (envelope-from ) id 1Melu7-0007hZ-R2 for emacs-devel@gnu.org; Sat, 22 Aug 2009 04:24:52 -0400 Original-Received: from godzilla.ics.uci.edu (godzilla.ics.uci.edu [128.195.10.101]) by sallyv2.ics.uci.edu (8.13.8+Sun/8.13.8) with ESMTP id n7M8NBt3002491 for ; Sat, 22 Aug 2009 01:23:11 -0700 (PDT) Original-Received: (from dann@localhost) by godzilla.ics.uci.edu (8.13.8+Sun/8.13.6/Submit) id n7M8NAk5028199; Sat, 22 Aug 2009 01:23:10 -0700 (PDT) Original-Lines: 54 X-ICS-MailScanner-Information: Please contact the ISP for more information X-ICS-MailScanner-ID: n7M8NBt3002491 X-ICS-MailScanner: Found to be clean X-ICS-MailScanner-SpamCheck: not spam, SpamAssassin (score=-1.44, required 5, autolearn=disabled, ALL_TRUSTED -1.44) X-ICS-MailScanner-From: dann@godzilla.ics.uci.edu X-detected-operating-system: by monty-python.gnu.org: Solaris 10 (beta) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:114509 Archived-At: Running a compilation job the produces a lot of text output with M-x compile is much slower than running it in a shell. For example With emacs/lisp as the current directory, doing M-x compile RET grep -nH -e emacs *.el */*.el RET takes 25 seconds The output is 4500 lines Running the same command in an xterm takes 1.5 seconds! gprof data: % cumulative self self total time seconds seconds calls s/call s/call name 31.19 2.72 2.72 52618323 0.00 0.00 lookup_char_property 20.30 4.49 1.77 51726150 0.00 0.00 previous_interval 12.16 5.55 1.06 208889310 0.00 0.00 Fcdr 5.85 6.06 0.51 52444384 0.00 0.00 Fassq 5.39 6.53 0.47 4573 0.00 0.00 Fprevious_single_property_change 2.64 6.76 0.23 8860105 0.00 0.00 mark_object 2.52 6.98 0.22 10621 0.00 0.00 Fsetcar 2.29 7.18 0.20 52618300 0.00 0.00 textget 1.83 7.34 0.16 59828 0.00 0.00 re_search_2 1.72 7.49 0.15 305181 0.00 0.00 re_match_2_internal 1.03 7.58 0.09 82087 0.00 0.00 Fbyte_code 0.80 7.65 0.07 9094 0.00 0.00 adjust_for_invis_intang 0.80 7.72 0.07 581767 0.00 0.00 find_interval 0.69 7.78 0.06 295253 0.00 0.00 next_interval 0.69 7.84 0.06 21 0.00 0.02 Fgarbage_collect 0.57 7.89 0.05 23886 0.00 0.00 mark_vectorlike Observations: - there's a lot of garbage collection going on - Fprevious_single_property_change is probably mostly called from compilation-error-properties Doing M-x (setq compilation-error-regexp-alist nil) RET then M-x compile RET grep -nH -e emacs *.el */*.el RET takes 3 seconds. So it seems that fontification (and things related to it) are very very expensive. Can someone familiar with the code in question take a look and figure out how to optimize this? Thanks --dan