Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/13974#discussion_r69231758
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayBasedMapData.scala
---
@@ -19,6 +19,11 @@ package org.apache.spark.sql.catalyst.util
class ArrayBasedMapData(val keyArray: ArrayData, val valueArray:
ArrayData) extends MapData {
require(keyArray.numElements() == valueArray.numElements())
+ for (i <- 0 until keyArray.numElements()) {
--- End diff --
Let's use a `while`-loop to replace `for` since Scala `for` is super slow.
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