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https://jira.codehaus.org/browse/MNG-5367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=320635#comment-320635
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Patrick Decat commented on MNG-5367:
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Same issue with Maven 3.0.3 & 3.0.4 and maven-dependency-plugin 2.4.
Fixed with maven-dependency-plugin 2.5 & 2.6.
> mvn 3.0.4 is extreemly slow with a large number of "import" dependencies.
> -------------------------------------------------------------------------
>
> Key: MNG-5367
> URL: https://jira.codehaus.org/browse/MNG-5367
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Dependencies
> Affects Versions: 3.0.4
> Environment: Linux skhalipau.internal.corp 3.2.0-32-generic
> #51-Ubuntu SMP Wed Sep 26 21:33:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
> Reporter: Siarhei Khalipau
> Attachments: jprofiler_mvn_dependency_tree.tar.bz2,
> mvn_2.2.1_dependency_tree.log, mvn_3.0.4_dependency_tree.log, stacktrace.txt
>
>
> In comparison with maven 2.2.1 resolving of dependencies with scope "import"
> is very slow in maven 3.
> Example results for "mvn dependency:tree" in one my project: maven 2.2.1 says
> "[INFO] Total time: 8 seconds" but 3.0.4 "[INFO] Total time: 13:02.069s".
> Resulting trees are identical.
> I profiled the code and found that maven 3 did not cache parsed pom files but
> it reads and parses one pom file every time when it find it in imported
> dependencies. So the method
> org.apache.maven.model.building.DefaultModelBuilder.importDependencyManagement()
> is called many times for one artifact. There is JProfiler result for "mvn
> dependency:tree" in attachment.
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