Github user bomeng commented on the pull request:
https://github.com/apache/spark/pull/12191#issuecomment-211543283
Yes, the reason for sorting the keywords is for ease of searching purpose.
I have checked the generated codes and see the switch/case for each
non-reserved words. But to my understanding, case A: case B: ... won't have
performance difference as case A | B: ... this should be easily optimized by
the compiler.
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