Xiangrui Meng created SPARK-7140:
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Summary: Do not scan all values in Vector.hashCode
Key: SPARK-7140
URL: https://issues.apache.org/jira/browse/SPARK-7140
Project: Spark
Issue Type: Improvement
Components: MLlib
Reporter: Xiangrui Meng
Assignee: Xiangrui Meng
It makes hashCode really expensive. The Pyrolite version we are using in Spark
calls it in serialization. Scanning the first few nonzeros should be sufficient.
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