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https://jira.codehaus.org/browse/MDEP-368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=306620#comment-306620
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Olivier Lamy commented on MDEP-368:
-----------------------------------
fixed and snapshot deployed.
you can now use
<useJvmChmod>true</useJvmChmod>
> Configure plexus-archiver to use java.io.File methods to set permissions when
> available.
> ----------------------------------------------------------------------------------------
>
> Key: MDEP-368
> URL: https://jira.codehaus.org/browse/MDEP-368
> Project: Maven 2.x Dependency Plugin
> Issue Type: Improvement
> Components: unpack, unpack-dependencies
> Affects Versions: 2.5
> Reporter: Tim Moore
> Assignee: Olivier Lamy
> Fix For: 2.5.1
>
> Attachments: useJvmChmod.patch
>
>
> We updated from maven-dependency-plugin 2.4 to 2.5 in our build, and found
> that it slowed down significantly. Our build process involves unpacking
> several large zip files, and profiling the build showed us that the extra
> time was spent in Plexus Archiver's {{ArchiveEntryUtils.chmod}}, where it was
> executing a {{chmod}} process for each file in the archive.
> We tracked this change to an update of the Plexus Archiver dependency from
> 2.0 to 2.1.1 in version 2.5 of the Maven Dependency Plugin:
> http://svn.apache.org/viewvc?view=revision&revision=1292983
> Plexus Archiver can be configured to use the {{setReadable}}, {{setWritable}}
> and {{setExecutable}} methods on {{java.io.File}} instead of executing
> {{chmod}}. These methods are new in Java 6, but Plexus Archiver invokes them
> using reflection when they are available, falling back on executing {{chmod}}
> when they are not, so it remains backwards compatible with Java 5.
> This configuration is disabled by default, but can be configured via Plexus.
> The attached patch to Maven Dependency Plugin sets the archiver components to
> use the JVM implementation when available.
> The patch doesn't include tests, since the behavior is dependent on the Java
> version used, but when applied all of the existing tests pass in Java 6.
> Credit for the investigation and the patch is due to Vincent Choy
> (vc...@atlassian.com). He asked me to file this issue on his behalf.
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