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https://jira.codehaus.org/browse/MNG-5125?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=273702#comment-273702
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Vivin Paliath commented on MNG-5125:
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I'm also seeing this issue, although my comparison was between 3.0b1 and 3.0.3.
I don't have much to add to Patrick's excellent analysis. I can confirm that
the bottleneck is in the same area that Patrick identified.
> Regression: mvn 3.0.3 is extreemly slow with a large number of dependencies
> ---------------------------------------------------------------------------
>
> Key: MNG-5125
> URL: https://jira.codehaus.org/browse/MNG-5125
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Artifacts and Repositories, Inheritance and
> Interpolation, Performance
> Affects Versions: 3.0.3
> Environment: Java: 1.6.0_24-b07
> Maven: 3.0.3
> RHEL6: 2.6.32-131.2.1.el6.x86_64
> Reporter: Patrick Staton
> Attachments: 302tree.out, 303tree.out, mvn302profile.html,
> mvn303profile.html
>
>
> I am pretty sure that
> [AETHER-82|https://issues.sonatype.org/browse/AETHER-82] / rev
> [a537899308f3d22df5509e33628a0012ba912293|https://github.com/sonatype/sonatype-aether/commit/a537899308f3d22df5509e33628a0012ba912293]
> has caused maven 3.0.3 to be extremely slow in our build.
> Profiling shows that when we build one of our projects with many
> dependencies,
> org.sonatype.aether.impl.internal.DefaultDependencyCollector.process is being
> called >50000 times in maven 3.0.3 whereas it is called 335 times in maven
> 3.0.2.
> Attached is the html output from a netbeans profiling session of the same
> build with maven 3.0.2 and maven 3.0.3. I stopped the maven 3.0.3 build after
> ~5 mins of being stuck at the "[INFO] Building many-deps-project
> 1.2.3.4-SNAPSHOT" step.
> A 'mvn dependency:tree' is identical between the two except that it takes
> about 10 mins to run in 3.0.3. I have attached the output. If you need me to
> do a better job censoring the output, ie make the project names unique, let
> me know.
> "webapp-jar" type dependencies are a custom artifact handler:
> {code}
> <component>
> <role>org.apache.maven.artifact.handler.ArtifactHandler</role>
> <role-hint>webapp-jar</role-hint>
>
> <implementation>org.apache.maven.artifact.handler.DefaultArtifactHandler</implementation>
> <configuration>
> <classifier>webapp</classifier>
> <type>webapp-jar</type>
> <extension>jar</extension>
> <language>java</language>
> <addedToClasspath>false</addedToClasspath>
> </configuration>
> </component>
> {code}
> We have "java-source" dependencies because we use GWT.
> I cannot send you the actual pom files.
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