Liwei Lin created SPARK-17359:
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Summary: Use +=(A) instead of append(A) in performance critical
paths
Key: SPARK-17359
URL: https://issues.apache.org/jira/browse/SPARK-17359
Project: Spark
Issue Type: Improvement
Components: MLlib, SQL
Affects Versions: 2.0.0
Reporter: Liwei Lin
Priority: Minor
We should generally use ArrayBuffer.+=(A) rather than ArrayBuffer.append(A),
because append(A) would involve extra boxing / unboxing.
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