Francesco Nigro created ARTEMIS-1702:
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Summary: ConcurrentLongHashMap and ConcurrentLongHashSet should
avoid volatile set cost on put
Key: ARTEMIS-1702
URL: https://issues.apache.org/jira/browse/ARTEMIS-1702
Project: ActiveMQ Artemis
Issue Type: Improvement
Reporter: Francesco Nigro
Assignee: Francesco Nigro
ConcurrentLongHashSet/HashMap are making use of unecessary volatile store of
size/capacity for modifier methods.
The current JVM implementation of volatile store for multicore x86 is making
use of a StoreLoad barrier for this operation: the most expensive one.
These volatile stores could be replaced by plain stores/lazySet ones with no
effects on the correctness of those methods.
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