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https://issues.apache.org/jira/browse/ARIES-1565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419233#comment-15419233
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John Ross commented on ARIES-1565:
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These symptoms were among the strangest I've ever seen. The cause is the
importing of the org.apache.aries.util.filesystem.impl package in
UnpackingFileSystemImpl and CleanableCLosableDirectory. This is a private
package of the org.apache.aries.util bundle. It appears that either this
contribution must be rewritten so that these imports are no longer needed, or
the util bundle must export the package. It's not clear to me why the issue
seems to only appear when running the tests and not at runtime.
> Performance Improvement: unpack subsystem artifacts to tmp folder to avoid
> directly reading from zip archive
> ------------------------------------------------------------------------------------------------------------
>
> Key: ARIES-1565
> URL: https://issues.apache.org/jira/browse/ARIES-1565
> Project: Aries
> Issue Type: Improvement
> Components: Subsystem, Util
> Affects Versions: subsystem-2.0.8, util-1.1.2
> Reporter: Wouter Bancken
> Attachments: 1565.patch, Call_Tree_2_0_8.html,
> Call_Tree_John_Ross.html, Call_Tree_Wouter_Bancken.html,
> aries1565-profile.png, test-service-subsystem-4.0.2-SNAPSHOT.esa
>
>
> h4. Description
> Aries copies ESA archives to a temporary zip file during the installation
> phase. Afterwards, bundles are read directly from this temporary zip which
> has a large impact on the startup performance of Aries applications. By
> unpacking the esa artifact into the temporary folder it is unpacked only
> once. Subsequent reads for the bundles (jars) can be read directly from the
> folder.
> h4. Pull request
> https://github.com/apache/aries/compare/subsystem-2.0.x...WouterBanckenACA:io_performance_optimalisation?expand=1
> h4. Mailinglist
> http://mail-archives.apache.org/mod_mbox/aries-user/201606.mbox/%3CCAL5nZgTq5FxDvURJbzcEZ9YHx6vTs3HAOuFYDYA3ec9OZbmwjA%40mail.gmail.com%3E
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