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https://issues.apache.org/jira/browse/ARTEMIS-2844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Domenico Francesco Bruscino closed ARTEMIS-2844.
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Fix Version/s: 2.15.0
Resolution: Done
> Improve MQTT subscribe/unsubscribe topic performance
> ----------------------------------------------------
>
> Key: ARTEMIS-2844
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2844
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker, MQTT
> Affects Versions: 2.14.0
> Reporter: Francesco Nigro
> Priority: Major
> Fix For: 2.15.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> MQTT (and not only) is severely effected on its performance while
> subscribing/unsubscribing when many topics are existing because:
> * SimpleAddressManager::getMatchingBindings/getDirectBindings are performing
> a linear search on all the existing Bindings
> * the results of the previous matches are saved into a Bindings instance even
> if not necessary (note: Bindings perform atomic operations while saving the
> matching Binding)
> * All the MQTT operations are performed in the Netty event loop
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