zhijiangW commented on issue #11155: [FLINK-14818][benchmark] Fix receiving InputGate setup of StreamNetworkBenchmarkEnvironment. URL: https://github.com/apache/flink/pull/11155#issuecomment-590720137 Thanks for the updates @wsry . As for the issue of connection index, I prefer to keeping it as previous value, then we can only measure the performance effect caused by gate/channel amount. If we want to adjust the connection amount via `connectionIndex`, it should be a separate work to do in future if confirmed necessary. If the performance regression still exists after getting ride of connection factor, caused by total buffers reduction as you analyzed above, I am a bit torn whether we should increase the default floating buffer setting for these benchmarks in order to keep the performance same as before. Otherwise we might have a bad/invalid curve to trace the performance changes in history term. WDYT? @pnowojski
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