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https://issues.apache.org/jira/browse/AMQ-7021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16558106#comment-16558106
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ASF subversion and git services commented on AMQ-7021:
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Commit 0b76d3a0eac9802941b9dfc2a85589dac95ed40a in activemq's branch
refs/heads/master from gtully
[ https://git-wip-us.apache.org/repos/asf?p=activemq.git;h=0b76d3a ]
AMQ-7021 - add unsynchronised accessors to destination map for usage with rw
lock from abstract region; allow concurrent read of the destination map
> 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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