From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#58558: 29.0.50; re-search-forward is slow in some buffers Date: Mon, 10 Apr 2023 16:40:51 +0300 Message-ID: <83mt3fc0t8.fsf@gnu.org> References: <877d10r21x.fsf@localhost> <878rlfjmjh.fsf@localhost> <87mt9tbbbp.fsf@gnus.org> <8335bl18lo.fsf@gnu.org> <87wn8x9eqb.fsf@gnus.org> <87tu1zd2c6.fsf@localhost> <83h6xzphxm.fsf@gnu.org> <87wn6vbfaa.fsf@localhost> <838rjbpecw.fsf@gnu.org> <87fsdjwb4e.fsf@localhost> <874jtyuqax.fsf@localhost> <83zgbqm8q6.fsf@gnu.org> <87sfhit8ug.fsf@localhost> <83tu1ym6jo.fsf@gnu.org> <87h6xyt77x.fsf@localhost> <87h6ttkz6n.fsf@localhost> <838rf5qkpt.fsf@gnu.org> <87lej0zv92.fsf@localhost> <83ttxol6f5.fsf@gnu.org> <87h6tolybs.fsf@localhost> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="22045"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 58558@debbugs.gnu.org, larsi@gnus.org, monnier@iro.umontreal.ca To: Ihor Radchenko Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Apr 10 15:41:25 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1plrls-0005Sz-P4 for geb-bug-gnu-emacs@m.gmane-mx.org; 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Original-Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1plrkh-0004fq-13; Mon, 10 Apr 2023 09:40:11 -0400 In-Reply-To: <87h6tolybs.fsf@localhost> (message from Ihor Radchenko on Mon, 10 Apr 2023 12:24:23 +0000) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:259576 Archived-At: > From: Ihor Radchenko > Cc: monnier@iro.umontreal.ca, larsi@gnus.org, 58558@debbugs.gnu.org > Date: Mon, 10 Apr 2023 12:24:23 +0000 > > >> 43.82%--Fre_search_forward > >> --43.81%--search_command > >> --43.78%--search_buffer > >> --43.78%--search_buffer_re > >> --43.33%--re_search_2 > >> --36.39%--re_match_2_internal > >> --21.90%--SYNTAX_TABLE_BYTE_TO_CHAR > >> --21.57%--BYTE_TO_CHAR > >> --21.49%--buf_bytepos_to_charpos > >> > >> Not sure if it is telling much. > > > > How does this compare with a "fast" session doing the same? > > "fast" (emacs 28) session does not have this call tree contributing > significantly. Hmm... I though when you just start a new Emacs session of Emacs 30 it also is fast, and becomes progressively slower with time? Or am I confused? > re_match_2_internal calls SYNTAX_TABLE_BYTE_TO_CHAR in a loop. So, if > something strange is happening with the loop, we may be calling > buf_bytepos_to_charpos more. I believe perf is capable of showing the number of calls as well? Can you compare the number of calls between the two versions?