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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