Github user viirya commented on the issue:
https://github.com/apache/spark/pull/18931
Ran with the same benchmark in SPARK-21603.
Before this patch:
After this patch:
Java HotSpot(TM) 64-Bit Server VM 1.8.0_102-b14 on Linux 4.9.36-moby
Intel(R) Core(TM) i7-5557U CPU @ 3.10GHz
max function length of wholestagecodegen: Best/Avg Time(ms)
Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------
codegen = F 548 / 740 1.2
836.6 1.0X
codegen = T 372 / 433 1.8
567.5 1.5X
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