Github user glentakahashi commented on the issue:
https://github.com/apache/spark/pull/20372
@gatorsmile can you link the ticket about the perf regression? I imagine
you would be seeing perf regressions in cases where partition counts are less
than total cluster capacity, as this has the chance to reduce parallelism there.
Also, is there a specific suite of perf-testing benchmarks that I should be
running here that are used in testing releases?
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