Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/13847#discussion_r68100206
--- Diff:
sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
---
@@ -298,6 +298,10 @@ public UnsafeMapData getMap(int ordinal) {
return map;
}
+ // This `hashCode` computation could consume much processor time for
large data.
+ // If the computation becomes a bottleneck, we can use a light-weight
logic; the first fixed bytes
+ // are used to compute `hashCode` (See `Vector.hashCode`).
+ // The same issue exists in `UnsafeMapData.hashCode`.
--- End diff --
The same issue also exists for UnsafeRow...
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