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https://issues.apache.org/jira/browse/BEAM-6021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16725738#comment-16725738
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Marek Simunek commented on BEAM-6021:
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Hi, [~mduhan] this registration only influence sparkRunner *internal* objects
which are then used in Spark. If you are using SparkRunner you can gain
performence benefit because it doesnt need to send class name with every object
but it register only with id.
As part of your question I dont understand how its related to *Beam*.
> Registered more internal classes for kryo serialization
> -------------------------------------------------------
>
> Key: BEAM-6021
> URL: https://issues.apache.org/jira/browse/BEAM-6021
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Affects Versions: 2.8.0
> Reporter: Marek Simunek
> Assignee: Marek Simunek
> Priority: Major
> Fix For: 2.10.0
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> When using {{KryoSerializer}} we could improve serialization performance with
> registering internal classes used in SparkRunner.
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