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reactor / reactor-core

Non-Blocking Reactive Foundation for the JVM
http://projectreactor.io
Apache License 2.0
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Skip Automatic Context Propagation in special operators #3845

Closed chemicL closed 4 months ago

chemicL commented 4 months ago

This change should improve performance of Automatic Context Propagation in certain cases when doOnDiscard, onErrorContinue, and onErrorStop are used.

The context-propagation integration requires contextWrite and tap operators to be barriers for restoring ThreadLocal values. Some internal usage of contextWrite does not require us to treat the operators the same way and we can skip the ceremony of restoring ThreadLocal state as we know that no ThreadLocalAccessor can be registered for them. Therefore, a private variant is introduced to avoid unnecessary overhead when not required.

Related #3840

chemicL commented 4 months ago

@violetagg thank you for the review!