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https://issues.apache.org/jira/browse/POOL-93?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490928
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Marcos Sanz commented on POOL-93:
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I have included a simmilar patch to Holger's, this time for the
GenericObjectPool.
I have refrained from introducing volatile variables.I have also refrained from
synchronizing the access to _testOnReturn, which is really not worth bothering.
The performance improvement in borrow/return time after applying the patch
reaches in some cases one order of magnitude. All unit tests passed.
I think further improvement in the liveness of this class can be done, mainly
by alleviating synchronization in the borrowObject() method.
> Reduce contention by making borrow & return more independent from each other
> ----------------------------------------------------------------------------
>
> Key: POOL-93
> URL: https://issues.apache.org/jira/browse/POOL-93
> Project: Commons Pool
> Issue Type: Improvement
> Affects Versions: Nightly Builds
> Reporter: Holger Hoffstätte
> Attachments: GenericObjectPool.patch, GKOP-relaxedSyncOnReturn.patch,
> perf-patch-GenericPool.txt, relaxedReturnObjectBenchmark.txt
>
>
> Currently borrow & return are completely blocked from each other, while at
> least the factory-based validation & destruction can be handled
> independently. A few simple changes narrow the synchronization blocks yet
> retain overall correctness.
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