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[SPARK-5803][MLLIB] use ArrayBuilder to build primitive arrays
because ArrayBuffer is not specialized. Author: Xiangrui Meng <meng@databricks.com> Closes #4594 from mengxr/SPARK-5803 and squashes the following commits: 1261bd5 [Xiangrui Meng] merge master a4ea872 [Xiangrui Meng] use ArrayBuilder to build primitive arrays
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- mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala 3 additions, 3 deletions.../main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
- mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala 5 additions, 5 deletions...main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
- mllib/src/main/scala/org/apache/spark/mllib/util/NumericParser.scala 5 additions, 5 deletions...ain/scala/org/apache/spark/mllib/util/NumericParser.scala
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