Github user holdenk commented on a diff in the pull request:
https://github.com/apache/spark/pull/9524#discussion_r46876119
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala ---
@@ -189,6 +190,18 @@ final class GBTClassificationModel private[ml](
override def treeWeights: Array[Double] = _treeWeights
+ // We use two vals with options rather than lazy vals since we want
+ // the codeGen to be eagerly evaluated.
+ val treePredictors = useCodeGen match {
--- End diff --
Not really, I'm just used to writing match statements. Thats a good point
though, I'll swap in an if/else.
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