pnowojski commented on issue #6417: [FLINK-9913][runtime] Improve output serialization only once in RecordWriter URL: https://github.com/apache/flink/pull/6417#issuecomment-412900643 One possible bad news. I have run benchmarks as defined in https://github.com/dataArtisans/flink-benchmarks on this branch and quite a lot of them have shown performance regression. The worst was `StreamNetworkThroughputBenchmarkExecutor` with `1,100ms` params - regression ~18%. Could you run those benchmarks locally and confirm if that's the case or not?
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