Github user jkbradley commented on a diff in the pull request: https://github.com/apache/spark/pull/8549#discussion_r40984204 --- Diff: mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala --- @@ -250,7 +250,8 @@ object GradientBoostedTrees extends Logging { predError = GradientBoostedTreesModel.updatePredictionError( input, predError, baseLearnerWeights(m), baseLearners(m), loss) predErrorCheckpointer.update(predError) - logDebug("error of gbt = " + predError.values.mean()) + val currentPredError = predError.values.mean() --- End diff -- Since this is only used in logDebug, it would be better to put it inside logDebug so that it is not computed if debug logging is turned off.
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