Github user srowen commented on the issue:
https://github.com/apache/spark/pull/15736
Hm why does the order matter - maybe helps branch prediction? I doubt we
even know how the bytecode orders this let alone how it is JITted and whether
it will gather branching info on this one branch. Either way. I usually prefer
== for code clarity all else equal. No need to benchmark both just pick one.
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