Github user squito commented on the issue:
https://github.com/apache/spark/pull/15249
@kayousterhout good idea about running performance tests, I hadn't run them
on a recent rev. I confirmed that the issue in
https://github.com/apache/spark/pull/14871 was no longer present (just to be
sure, I also ran a test where I re-introduced the issue, and did see a big drop
performance).
I agree with your assessments of the current situation, and appreciate you
driving this forward. I'll send an email to the dev list shortly -- please add
anything I may overlooked.
thanks!
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