Xiangrui Meng created SPARK-14850:
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Summary: VectorUDT/MatrixUDT should take primitive arrays without
boxing
Key: SPARK-14850
URL: https://issues.apache.org/jira/browse/SPARK-14850
Project: Spark
Issue Type: Improvement
Components: ML, SQL
Affects Versions: 1.6.1, 2.0.0
Reporter: Xiangrui Meng
Priority: Critical
In SPARK-9390, we switched to use GenericArrayData to store indices and values
in vector/matrix UDTs. However, GenericArrayData is not specialized for
primitive types. This might hurt MLlib performance badly. We should consider
either specialize GenericArrayData or use a different container.
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