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Posted to issues@spark.apache.org by "Xiangrui Meng (JIRA)" <ji...@apache.org> on 2016/04/22 18:42:13 UTC

[jira] [Created] (SPARK-14850) VectorUDT/MatrixUDT should take primitive arrays without boxing

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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