spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sean Owen (JIRA)" <>
Subject [jira] [Resolved] (SPARK-5766) Slow RowMatrix multiplication
Date Sat, 09 Jan 2016 12:49:39 GMT


Sean Owen resolved SPARK-5766.
    Resolution: Not A Problem

Or to some degree this is already done via netlib

> Slow RowMatrix multiplication
> -----------------------------
>                 Key: SPARK-5766
>                 URL:
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>            Reporter: Amaru Cuba Gyllensten
>            Priority: Minor
>              Labels: matrix
> Looking at the source code for RowMatrix multiplication by a local matrix, it seems like
it is going through all columnvectors of the matrix, doing pairwise dot product on each column.
> It seems like this could be sped up by using gemm, performing full matrix-matrix multiplication
on the local data, (or gemv, for vector-matrix multiplication), as is done in BlockMatrix
or Matrix.

This message was sent by Atlassian JIRA

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message