[jira] [Created] (SPARK-5803) Use ArrayBuilder instead of ArrayBuffer for primitive types

[Xiangrui Meng (JIRA)]

Xiangrui Meng created SPARK-5803:
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             Summary: Use ArrayBuilder instead of ArrayBuffer for primitive 
types
                 Key: SPARK-5803
                 URL: https://issues.apache.org/jira/browse/SPARK-5803
             Project: Spark
          Issue Type: Improvement
          Components: MLlib
    Affects Versions: 1.3.0
            Reporter: Xiangrui Meng
            Assignee: Xiangrui Meng


ArrayBuffer is not specialized and hence it boxes primitive-typed values.



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