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https://issues.apache.org/jira/browse/QPID-7723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keith Wall resolved QPID-7723.
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Resolution: Fixed
> [0-10] Re-encoding of the 0-10 message during computation of
> updateStatsOnEnqueue causes performance slow down
> --------------------------------------------------------------------------------------------------------------
>
> Key: QPID-7723
> URL: https://issues.apache.org/jira/browse/QPID-7723
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: qpid-java-broker-7.0.0
> Reporter: Keith Wall
> Assignee: Keith Wall
> Fix For: qpid-java-broker-7.0.0
>
> Attachments: hotspot_comparison.tar.bz2
>
>
> We are seeing a slowdown in the Java Broker for the 0-10 protocol since
> February 2017. Investigation with JProfiler is pointing to the introduction
> of the ring queue feature as being a possible cause. The performance drop
> is most apparent with on the transient profiles, where the drop is around
> ~2-3%.
> The problem is the new call to MessageMetaData_0_10#getStorableSize made from
> AbstractQueueEntryList#updateStatsOnEnqueue. On the 0-10 path, this causes
> the header delivery properties/message properties/non standard delivery
> properties to be encoded in order to compute the store size. This encoding
> step is separate to the encoding step that takes place when the message is
> sent to a consumer. The up shot is that the headers for a transient message
> that is not flown to disk are now encoded twice rather than once.
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