Github user franz1981 commented on the issue:
https://github.com/apache/activemq-artemis/pull/2328
@michaelandrepearce I have done some experiments on it and I have noticed
that the issue is the contention of the `state` field on `StampedLock` with the
rest of the surrounding fields on the heap. Just using a `AtomicLongArray` of
32 elements (256 bytes) and using the 16th element to hold the state is enough
to avoid any weird contention issues with multi-sockets setup.
The effects of such change is so evident that just using a single-socket
CPU would already benefit by this change.
The point is that it is an extreme way to improve perf on this and I don't
know if we've such high contention of TypedProperties to justify it...
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