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https://issues.apache.org/jira/browse/QPID-7723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16019774#comment-16019774
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ASF subversion and git services commented on QPID-7723:
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Commit 400e7ec7090fd2135996a43343e885889adfd78d in qpid-broker-j's branch
refs/heads/6.1.x from [~k-wall]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-broker-j.git;h=400e7ec ]
QPID-7723: [0-10] Allow header to be optional when computing the encoded size
> [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-6.0.7, qpid-java-broker-7.0.0, qpid-java-6.1.3
>
> 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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