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From "Christiaan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (OPENJPA-439) Performance degradation in multi-transaction operations
Date Sun, 11 Nov 2007 16:57:50 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Christiaan updated OPENJPA-439:
-------------------------------

    Attachment: performance testcase results.zip

profiler screenshots

> Performance degradation in multi-transaction operations
> -------------------------------------------------------
>
>                 Key: OPENJPA-439
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-439
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 0.9.0, 0.9.6, 0.9.7, 1.0.0, 1.0.1, 1.0.2, 1.1.0
>            Reporter: Patrick Linskey
>             Fix For: 1.1.0
>
>         Attachments: OPENJPA-439.patch, performance testcase results.zip, testcaseperformance.zip
>
>
> Reusing a Broker for multiple transactions / persistence contexts demonstrates a performance
degradation, possibly due to explicit calls to clear sets and maps, rather than just dereferencing
them.
> Discussion: http://www.nabble.com/Performance-drop-in-AbstractHashedMap.clear%28%29-tf4769771.html#a13656730

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