Return-Path: Delivered-To: apmail-lucene-dev-archive@www.apache.org Received: (qmail 84680 invoked from network); 16 Mar 2011 13:04:54 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 16 Mar 2011 13:04:54 -0000 Received: (qmail 56571 invoked by uid 500); 16 Mar 2011 13:04:53 -0000 Delivered-To: apmail-lucene-dev-archive@lucene.apache.org Received: (qmail 56426 invoked by uid 500); 16 Mar 2011 13:04:53 -0000 Mailing-List: contact dev-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@lucene.apache.org Delivered-To: mailing list dev@lucene.apache.org Received: (qmail 56419 invoked by uid 99); 16 Mar 2011 13:04:53 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Mar 2011 13:04:53 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=5.0 tests=ALL_TRUSTED,T_RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Mar 2011 13:04:51 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id A4AA83AC793 for ; Wed, 16 Mar 2011 13:04:29 +0000 (UTC) Date: Wed, 16 Mar 2011 13:04:29 +0000 (UTC) From: "Robert Muir (JIRA)" To: dev@lucene.apache.org Message-ID: <905464115.6403.1300280669671.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] Created: (LUCENE-2970) SpecialOperations.isFinite can have TERRIBLE TERRIBLE runtime in certain situations MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org SpecialOperations.isFinite can have TERRIBLE TERRIBLE runtime in certain situations ----------------------------------------------------------------------------------- Key: LUCENE-2970 URL: https://issues.apache.org/jira/browse/LUCENE-2970 Project: Lucene - Java Issue Type: Bug Affects Versions: 4.0 Reporter: Robert Muir Assignee: Robert Muir Fix For: 4.0 in an application of mine, i experienced some very slow query times with finite automata (all the DFAs are acyclic) It turned out, the slowdown is some terrible runtime in SpecialOperations.isFinite <-- this is used to determine if the DFA is acyclic or not. (in this case I am talking about even up to minutes of cpu). -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org For additional commands, e-mail: dev-help@lucene.apache.org