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

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Auto Closed
• Affects Version/s: 2.4
• Component/s: tree
• 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
• Assignee: Unassigned
• Reporter: Siarhei Khalipau
• Created: 01/Nov/12 04:15
• Updated: 16/Mar/18 22:42
• Resolved: 16/Mar/18 22:42

Description

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.

Issue Links

• relates to: MNG-5125 Regression: mvn 3.0.3 is extreemly slow with a large number of dependencies