Github user franz1981 commented on the issue:
https://github.com/apache/activemq-artemis/pull/2012
@cshannon ehehe I wish to have said "would" :) The problem with the
references is that the footprint of the reference depends on the JVM
configuration (`-XX:+UseCompressedOops` or not) and on the alignment with the
rest of the fields: the JVM tends to add padding in order to have each field
size-aligned.---
