Siarhei Khalipau created MNG-5367:
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Summary: 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
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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