Github user gengliangwang commented on the issue:
https://github.com/apache/spark/pull/19478
@viirya @hvanhovell @gatorsmile
Thanks, I have attached the performance result in the description in this
PR.
Overall I don't see any downside of the code change.
Also it is possible to take much more time to get the `deterministic` of
UDF, while making it lazy value can avoid that.
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