reswqa commented on PR #21199:
URL: https://github.com/apache/flink/pull/21199#issuecomment-1350592950

   @zhuzhurk Thank you for reminding me to benchmark the scheduling 
performance. I tested the `SchedulingDownstreamTasksInBatchJobBenchmark ` 
locally with `VertexwiseSchedulingStrategy ` and `4000 * 4000` parallelism. 
There was no obvious performance gap before and after this pull request. In 
both cases, the execution time of single test was between 2 and 3 seconds.


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