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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/04/25 07:34:39 UTC

[jira] [Assigned] (SPARK-7140) Do not scan all values in Vector.hashCode

     [ https://issues.apache.org/jira/browse/SPARK-7140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-7140:
-----------------------------------

    Assignee: Xiangrui Meng  (was: Apache Spark)

> 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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