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https://issues.apache.org/jira/browse/ARTEMIS-905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Francesco Nigro closed ARTEMIS-905.
-----------------------------------
Resolution: Fixed
> JCtools ConcurrentMap replacement
> ---------------------------------
>
> Key: ARTEMIS-905
> URL: https://issues.apache.org/jira/browse/ARTEMIS-905
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Reporter: Francesco Nigro
> Priority: Minor
>
> The OSS project JCTools (already used in Netty core) provides primitive
> (long) and normal implementations of ConcurrentMap with better scalability,
> lower memory footprint (garbage collector wise too) and equals to better
> performances than the vanilla's ConcurrentHashMap.
> It worth to replace every ConcurrentHashMap usage with the JCtools version.
> [Here|http://www.azulsystems.com/blog/cliff/2007-03-26-non-blocking-hashtable]
> there is an old but valid overview of the map and on JCtools are provided
> [JMH
> benchmarks|https://github.com/JCTools/JCTools/blob/master/jctools-benchmarks/src/main/java/org/jctools/maps/nhbm_test/jmh/ConcurrentMapThroughput.java]
> to evaluate the performance of the implementation.
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