wsry opened a new pull request #15259:
URL: https://github.com/apache/flink/pull/15259
## What is the purpose of the change
For data broadcast, we can only copy the record once when writing data into
SortBuffer. Besides, we can write only one copy of data when spilling data into
disk. These optimizations can improve the performance of data broadcast. This
patch implements these optimizations.
## Brief change log
- Only copy the record once when writing data into SortBuffer for
broadcast;
- Write only one copy of data when spilling data into disk for broadcast.
## Verifying this change
Verified by both existing and newly added test cases.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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