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https://issues.apache.org/jira/browse/BEAM-1198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15805610#comment-15805610
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ASF GitHub Bot commented on BEAM-1198:
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Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/1678
> ViewFn: explicitly decouple runner materialization of side inputs from
> SDK-specific mapping
> -------------------------------------------------------------------------------------------
>
> Key: BEAM-1198
> URL: https://issues.apache.org/jira/browse/BEAM-1198
> Project: Beam
> Issue Type: New Feature
> Components: beam-model-fn-api, beam-model-runner-api
> Reporter: Kenneth Knowles
> Assignee: Kenneth Knowles
>
> 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.
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