Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11403#discussion_r55437473
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanInfo.scala ---
@@ -31,13 +32,26 @@ class SparkPlanInfo(
val simpleString: String,
val children: Seq[SparkPlanInfo],
val metadata: Map[String, String],
- val metrics: Seq[SQLMetricInfo])
+ val metrics: Seq[SQLMetricInfo]) {
+
+ override def hashCode(): Int = {
+ simpleString.hashCode
--- End diff --
Was the intent here to avoid an expensive-to-compute recursive hashcode
over children? If so, would memoization help instead?
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