StephanEwen opened a new pull request #13548:
URL: https://github.com/apache/flink/pull/13548
## What is the purpose of the change
A small code optimization attempting to reduce the virtual method call
overhead on the per-record methods in `ResultPartition`.
It does that by making the class wrapping the `ResultPartition` (formerly
`ConsumableNotifyingResultPartitionWriterDecorator`) a different class than the
one with the factory method. That way, if the factory method never needs a
wrapper class (under normal configuration, it never needs one) the wrapping
class is never loaded, and the JIT can find out (through CHA) that only one
implementation for the per-record methods on `ResultPartition` exists.
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): **no**
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: **no**
- The serializers: **no**
- The runtime per-record code paths (performance sensitive): **yes**
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **not applicable**
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