[jira] Commented: (MJAR-140) Performance degredation

["Erez Mazor (JIRA)" <ji...@codehaus.org>]

    [ https://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=272148#comment-272148 ] 

Erez Mazor commented on MJAR-140:
---------------------------------

Any updates on this issue?

> Performance degredation 
> ------------------------
>
>                 Key: MJAR-140
>                 URL: https://jira.codehaus.org/browse/MJAR-140
>             Project: Maven 2.x JAR Plugin
>          Issue Type: Bug
>    Affects Versions: 2.3, 2.3.1
>            Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project      *
> [WARNING] * contains the following plugin(s) that are not marked as       *
> [WARNING] * @threadSafe to support parallel building.                     *
> [WARNING] * While this /may/ work fine, please look for plugin updates    *
> [WARNING] * and/or request plugins be made thread-safe.                   *
> [WARNING] * If reporting an issue, report it against the plugin in        *
> [WARNING] * question, not against maven-core                              *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.

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