[ReduceFnRunner] Fix Prefetches - #39082
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arunpandianp
commented
Jun 24, 2026
arunpandianp
commented
- Add a prefetch for CombinedMetadata
- Prefetch ReduceFn using renamedContext instead of directContext. This improves prefetching on merging windows
1. Add a prefetch for CombinedMetadata 2. Prefetch ReduceFn using renamedContext instead of directContext. This improves prefetching on merging windows
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R: @scwhittle |
Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request optimizes the prefetching strategy within the ReduceFnRunner to reduce latency during window merging. By refining the context used for state access and ensuring necessary metadata is prefetched, the runner can handle state operations more efficiently. Highlights
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Code Review
This pull request updates the prefetchOnTrigger method in ReduceFnRunner.java to prefetch the metadata tag from the direct context state and switches the reduceFn.prefetchOnTrigger call to use the renamed context state instead of the direct context state. There are no review comments to address, and I have no additional feedback to provide.
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cc: @stankiewicz |
1. Add a prefetch for CombinedMetadata 2. Prefetch ReduceFn using renamedContext instead of directContext. This improves prefetching on merging windows
1. Add a prefetch for CombinedMetadata 2. Prefetch ReduceFn using renamedContext instead of directContext. This improves prefetching on merging windows
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