Claus Ibsen created CAMEL-26900:
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Summary: camel-base-engine - DefaultReactiveExecutor.Worker: the
thread-confined fields do not need to be volatile
Key: CAMEL-26900
URL: https://issues.apache.org/jira/browse/CAMEL-26900
Project: Camel
Issue Type: Sub-task
Components: camel-core
Reporter: Claus Ibsen
Fix For: 4.25.0
{{DefaultReactiveExecutor.Worker}} declares {{queue}}, {{back}} and {{running}}
as {{volatile}}. A Worker is only reached through the {{workers}} ThreadLocal,
so it is confined to its thread and the volatile reads and writes on every
scheduled task are not needed.
Measured in CAMEL-25132: removing volatile gave about 2-4% on a 10-node route.
That is within noise but was consistent, so confirm it with JMH before and
after (single-threaded and multi-threaded on Linux).
Before changing it, check that nothing reads these fields from another thread
(JMX attributes, the executor statistics, debug or dev-console code).
Part of CAMEL-26898.
_Claude Code on behalf of davsclaus_
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