Details
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New Feature
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Status: Resolved
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P2
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Resolution: Fixed
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None
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None
Description
For side inputs, the field PCollectionView.fromIterableInternal implies an "iterable" materialization of the contents of a PCollection, which is adapted to the desired user-facing type within a UDF (today the PCollectionView "is" the UDF)
In practice, runners get adequate performance by special casing just a couple of types of PCollectionView in a rather cumbersome manner.
The design to improve this is https://s.apache.org/beam-side-inputs-1-pager and this makes the de facto standard approach the actual model.
