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[SPARK-3161][MLLIB] Adding a node Id caching mechanism for training deci...
...sion trees. jkbradley mengxr chouqin Please review this. Author: Sung Chung <schung@alpinenow.com> Closes #2868 from codedeft/SPARK-3161 and squashes the following commits: 5f5a156 [Sung Chung] [SPARK-3161][MLLIB] Adding a node Id caching mechanism for training decision trees.
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- examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRunner.scala 23 additions, 2 deletions.../org/apache/spark/examples/mllib/DecisionTreeRunner.scala
- mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala 98 additions, 16 deletions...main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
- mllib/src/main/scala/org/apache/spark/mllib/tree/RandomForest.scala 20 additions, 2 deletions...main/scala/org/apache/spark/mllib/tree/RandomForest.scala
- mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala 11 additions, 1 deletion.../org/apache/spark/mllib/tree/configuration/Strategy.scala
- mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala 204 additions, 0 deletions.../scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
- mllib/src/test/scala/org/apache/spark/mllib/tree/RandomForestSuite.scala 49 additions, 20 deletions...scala/org/apache/spark/mllib/tree/RandomForestSuite.scala
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