Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/13701
@viirya If you run multiple times and still see 5% performance difference,
you can confirm the penalty is around 5%. However, this might also depend on
the other factors, e.g., the total time. That means you might see a much lower
percentage when the total execution time is very large.
Hopefully, we can see a performance gain in TPC-DS. That really depends on
the workload and the queries. Cross my fingers!
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