Github user kiszk commented on a diff in the pull request: https://github.com/apache/spark/pull/13758#discussion_r67849962 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala --- @@ -142,3 +164,415 @@ class GenericArrayData(val array: Array[Any]) extends ArrayData { result } } + +final class GenericIntArrayData(private val primitiveArray: Array[Int]) --- End diff -- Thank you for your suggestion. It would be good to make ```GenericArrayData``` abstract. As you said, ```ArrayData``` will be mega-morphic in the class hierarchy, actual use should be monomorphic. To make each class ```final``` alleviate runtime overhead.
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