kiszk commented on issue #23171: [SPARK-26205][SQL] Optimize In for bytes, shorts, ints URL: https://github.com/apache/spark/pull/23171#issuecomment-447540932 Comment about JIT code generation for switch statement. Regardless of lookupswitch/tableswitch, JIT compiler generations native instructions suitable for data size/density (simple if-then, binary tree, or table lookup). It would be good to see [this article](https://stackoverflow.com/questions/44988841/force-tableswitch-instead-of-lookupswitch).
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