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https://issues.apache.org/jira/browse/ARTEMIS-1307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17836346#comment-17836346
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Francesco Nigro commented on ARTEMIS-1307:
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I was young(er) and more naive and just wanted to make "everything" faster :)
> Improve performance of OrderedExecutor
> --------------------------------------
>
> Key: ARTEMIS-1307
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1307
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 2.2.0
> Reporter: Francesco Nigro
> Assignee: Francesco Nigro
> Priority: Minor
>
> The current ordered executor is using ConcurrentLinkedQueue that:
> - has expensive queue::size operation (ie O( n ))
> - has node instances scattered in the heap
> There are faster and cheaper alternatives in specialized libraries (eg
> JCtools) that could be used instead of it to be more friendly with the GC and
> to provide more throughput too when CPU bound.
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