[jira] (MDEP-404) mvn 3.0.4 is extreemly slow with a large number of "import" dependencies.

["Olivier Lamy (JIRA)" <ji...@codehaus.org>]

     [ https://jira.codehaus.org/browse/MDEP-404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Olivier Lamy moved MNG-5367 to MDEP-404:
----------------------------------------

           Complexity:   (was: Intermediate)
          Component/s:     (was: Dependencies)
                       tree
    Affects Version/s:     (was: 3.0.4)
                       2.4
                  Key: MDEP-404  (was: MNG-5367)
              Project: Maven 2.x Dependency Plugin  (was: Maven 2 & 3)
    
> mvn 3.0.4 is extreemly slow with a large number of "import" dependencies.
> -------------------------------------------------------------------------
>
>                 Key: MDEP-404
>                 URL: https://jira.codehaus.org/browse/MDEP-404
>             Project: Maven 2.x Dependency Plugin
>          Issue Type: Bug
>          Components: tree
>    Affects Versions: 2.4
>         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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