From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Cecil Westerhof Newsgroups: gmane.emacs.help Subject: Re: Compile regular expression Date: Mon, 21 Dec 2009 14:03:35 +0100 Organization: Decebal Computing Message-ID: <87hbrkbhso.fsf@Traian.DecebalComp> References: <87pr68bott.fsf@Traian.DecebalComp> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1261410051 31613 80.91.229.12 (21 Dec 2009 15:40:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 21 Dec 2009 15:40:51 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Dec 21 16:40:44 2009 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1NMkNH-00006L-D7 for geh-help-gnu-emacs@m.gmane.org; Mon, 21 Dec 2009 16:40:43 +0100 Original-Received: from localhost ([127.0.0.1]:56004 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NMkNH-0002OQ-HU for geh-help-gnu-emacs@m.gmane.org; Mon, 21 Dec 2009 10:40:43 -0500 Original-Path: news.stanford.edu!usenet.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!newsgate.cistron.nl!newsgate.news.xs4all.nl!194.109.133.84.MISMATCH!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Original-Newsgroups: gnu.emacs.help X-Homepage: http://www.decebal.nl/ User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.3 (gnu/linux) Cancel-Lock: sha1:EaRBnCSAyk6n0AyNLOShlTWjZBI= Original-Lines: 20 Original-NNTP-Posting-Host: 84.53.123.169 Original-X-Trace: 1261400615 news.xs4all.nl 22939 decebal/[::ffff:84.53.123.169]:22124 Original-X-Complaints-To: abuse@xs4all.nl Original-Xref: news.stanford.edu gnu.emacs.help:175699 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:70779 Archived-At: Helmut Eller writes: >> I am working with CL at the moment. When you compile a regular >> expression in CL, the program is about 4 times as fast. This program is >> a translation of something I first wrote in elisp. So I was wondering if >> I could get the same advantage in my elisp code. But I could find >> nothing to compile a regular expression. Is this true, or am I not >> looking correctly? > > Emacs uses a cache for compiled regexps internally but it's not exposed. Okay, then in principle I do not have to worry. But one more question. I call a function a lot (five million times) with a string containing the regular expression. Does the cache work in this case also? Because the string is evaluated in the function and looses focus when returning. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof