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https://issues.apache.org/jira/browse/BEAM-11443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17549170#comment-17549170
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Danny McCormick commented on BEAM-11443:
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This issue has been migrated to https://github.com/apache/beam/issues/20779
> Byte-based GroupByKey in Flink Streaming
> ----------------------------------------
>
> Key: BEAM-11443
> URL: https://issues.apache.org/jira/browse/BEAM-11443
> Project: Beam
> Issue Type: Improvement
> Components: runner-flink
> Reporter: David Morávek
> Priority: P3
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Currently Flink Streaming GBK is implemented using
> `SystemReduceFn#buffering`, that works on de-serialized values (we need to
> de-serialize value after shuffle and then serialize again when appending to
> bag state).
> We can remove this unnecessary serde cycle by using binary representation
> instead of de-serialized payload.
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