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From "Siarhei Khalipau (JIRA)" <j...@codehaus.org>
Subject [jira] (MNG-5367) mvn 3.0.4 is extreemly slow with a large number of "import" dependencies.
Date Thu, 01 Nov 2012 12:17:13 GMT

     [ https://jira.codehaus.org/browse/MNG-5367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Siarhei Khalipau updated MNG-5367:
----------------------------------

    Attachment: stacktrace.txt

Typical stacktrace with deep recursion into "import" dependencies.
                
> 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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