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https://issues.apache.org/jira/browse/ARTEMIS-2844?focusedWorklogId=465011&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-465011
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ASF GitHub Bot logged work on ARTEMIS-2844:
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Author: ASF GitHub Bot
Created on: 31/Jul/20 12:49
Start Date: 31/Jul/20 12:49
Worklog Time Spent: 10m
Work Description: asfgit closed pull request #3217:
URL: https://github.com/apache/activemq-artemis/pull/3217
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Issue Time Tracking
-------------------
Worklog Id: (was: 465011)
Time Spent: 1.5h (was: 1h 20m)
> 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
> 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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