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From "Kevin Sutter (JIRA)" <>
Subject [jira] Commented: (OPENJPA-138) More performance improvements for OpenJPA (lib and kernel)
Date Mon, 12 Feb 2007 02:30:05 GMT


Kevin Sutter commented on OPENJPA-138:

Thanks for the input from everybody on this topic.  I've decided on the following items to
include with this Issue.  Please review the SVN commit for any possible hiccups.  I've run
the OpenJPA test buckets and, of course, we have been running our benchmarks with continued
success.  But, that doesn't mean that I didn't miss something, especially with the Kodo JDO
dependencies.  Thanks for your patience.

o Cache the TransactionManager in JNDIManagedRuntime
o Cache the Type hashcodes for OpenJPAId.hashcode()
o Cache the Type's ClassLoader instances in ObjectValue.newInstance()
o Cache the assignable "from" types and associated value "to" types in FetchConfigurationImpl.isAssignable
o Clean up the close/IllegalStateException processing in AbstractBrokerFactory and BrokerImpl
(gate with TRACE)
o Cache the assignable "from" types and associated value "to" types in BrokerImpl.newObjectId()


> More performance improvements for OpenJPA (lib and kernel)
> ----------------------------------------------------------
>                 Key: OPENJPA-138
>                 URL:
>             Project: OpenJPA
>          Issue Type: Sub-task
>          Components: kernel, lib
>            Reporter: Kevin Sutter
>         Assigned To: Kevin Sutter
> As we continue pushing OpenJPA though its paces, we're finding a few additional tweaks
that help with the performance throughput.  This Issue will be used to track this next set
of improvements.  I'll document more detail as we determine the correct fixes.  Several of
the changes relate to caching of objects in a hashmap instead of re-creating the objects every
time we call some of these methods.

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