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https://issues.apache.org/jira/browse/SPARK-17520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15486723#comment-15486723
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Apache Spark commented on SPARK-17520:
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User 'gglanzani' has created a pull request for this issue:
https://github.com/apache/spark/pull/15074

> Create a more performant __eq__ for SparseMatrix
> ------------------------------------------------
>
>                 Key: SPARK-17520
>                 URL: https://issues.apache.org/jira/browse/SPARK-17520
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>    Affects Versions: 2.0.0
>            Reporter: Giovanni Lanzani
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> Right now the SparseMatrix implementation has a slow __eq__ method (marked so 
> in the source code)
> A PR is available here https://github.com/apache/spark/pull/15074



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