Looks like your attachment from YourKit was stripped off. But your suggestion seems like a reasonable improvement; submit a JIRA enhancement request. Even better, a patch or a pull request! On Apr 9, 2016 11:51 AM, "Martin Lichtin" <lich...@yahoo.com.invalid> wrote:
With a test sending 5000 messages to a queue, I see heavy CPU use on the broker side (v 5.12.2). Using Yourkit it shows that the hot spot methods are FilePendingMessageCursor.isEmpty() iterates over in-memory messages and therefore (as it is a prioritized queue) uses PrioritizedPendingListIterator which uses OrderedPendingList.getAsList() which turns out to be an expensive method as it converts the self-managed linked list to a Java ArrayList. I wonder if anyone else has seen this issue? Perhaps PrioritizedPendingListIterator could be improved to walk the priority lists via OrderedPendingList iterators, as these are implemented efficiently. - Martin
