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https://issues.apache.org/jira/browse/AMQ-7021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Tully resolved AMQ-7021.
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Resolution: Fixed
A virtual topic send intensive test is ~40% better with the changes b/c
matching on the dest map can now operate in parallel as intended by the rw-lock
refactor.
Other users of destinationMap still retain the sync get/add semantics
> DestinationMap access inside Abstract Region readwrite lock does not need sync
> ------------------------------------------------------------------------------
>
> Key: AMQ-7021
> URL: https://issues.apache.org/jira/browse/AMQ-7021
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Broker
> Reporter: Gary Tully
> Assignee: Gary Tully
> Priority: Major
> Fix For: 5.16.0
>
>
> Using multiple virtual topic publishers, there is unnecessary serialisation
> via the destination map.
> the read write lock introduced in AMQ-3454 is sufficient to guard access in
> this case and reads should operate in parallel.
> with many thousand destinations lookup can be expensive and the serialisation
> becomes apparent.
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