srowen commented on issue #25470: [SPARK-28751][Core][WIP] Improve java serializer deserialization performance URL: https://github.com/apache/spark/pull/25470#issuecomment-546638906 I'd like to see a benchmark to prove there's much real-world benefit. The difference is just small here as the JVM caches the classes. `Class.forName` takes a bit of time, sure, but that is very small compared to even a single RPC's overhead.
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