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From "Emmanuel Renaud (JIRA)" <j...@codehaus.org>
Subject [jira] Created: (MAVEN-1786) Performance Optimization of the Reactor
Date Thu, 31 Aug 2006 08:49:48 GMT
Performance Optimization of the Reactor
---------------------------------------

                 Key: MAVEN-1786
                 URL: http://jira.codehaus.org/browse/MAVEN-1786
             Project: Maven
          Issue Type: Improvement
    Affects Versions: 1.1-beta-2
         Environment: OS windows xp, JVM sun 1.4.2
            Reporter: Emmanuel Renaud
         Attachments: Goal.java, reactor-jprofiler.GIF

The Goal.checkForCycle method is a hotspot as the reactor starts. 
Most of the time is spent in creating HashSets and filling them (see attached screen shot).

Instead of creating a new HasSet each time, reusing the same improves the performance of dependency
analysis (see attached file Goal.java). 

Due to security policy in my company I can't checkout the sources and run non-regression tests,
at least it works fine on our project.



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