cloud-fan commented on issue #25470: [SPARK-28751][Core][WIP] Improve java serializer deserialization performance URL: https://github.com/apache/spark/pull/25470#issuecomment-525180226 OK then I think the caching approach makes sense. BTW have you also benchmarked kryo serializer? AFAIK many users switch to kryo if they find out java serializer is too slow.
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