Github user michaelandrepearce commented on the issue:
https://github.com/apache/activemq-artemis/pull/1263
@franz1981 just updated to add in the journal compactor.
I ran out of time today, to deploy and run this with a profiler on our
servers to verify that this hasn't pushed the auto boxing further down or else
where, i will do this tomorrow.
In particular can you look at the way i have handled addAll for the
NonBlockingHashSetLong, is there a better way?
Also for the HashMap that had long keys in the journal which is not
concurrent, I've used the LongHashMap from netty.
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