srowen commented on a change in pull request #26454: [SPARK-29818][MLLIB]
Missing persist on RDD
URL: https://github.com/apache/spark/pull/26454#discussion_r344787564
##########
File path:
mllib/src/main/scala/org/apache/spark/ml/evaluation/MultilabelClassificationEvaluator.scala
##########
@@ -96,6 +96,7 @@ class MultilabelClassificationEvaluator (override val uid:
String)
.rdd.map { row =>
(row.getSeq[Double](0).toArray, row.getSeq[Double](1).toArray)
}
+ predictionAndLabels.persist()
Review comment:
I don't think so, it looks like the summarizer computes the summary stats in
one go.
In any event that would be an issue for MultilabelMetrics
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