[jira] [Updated] (MAHOUT-1202) Speed up Vector operations

["Suneel Marthi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAHOUT-1202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suneel Marthi updated MAHOUT-1202:
----------------------------------

    Fix Version/s: 0.8
    
> Speed up Vector operations
> --------------------------
>
>                 Key: MAHOUT-1202
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1202
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>    Affects Versions: 0.8
>            Reporter: Dan Filimon
>             Fix For: 0.8
>
>
> Vector assign() and aggregate() can be significantly improved in some conditions taking into account the different properties of the vectors we're working with.
> This issue relates to the design document at https://docs.google.com/document/d/1g1PjUuvjyh2LBdq2_rKLIcUiDbeOORA1sCJiSsz-JVU/edit#heading=h.koi571fvwha3jj
> and the patch at
> https://reviews.apache.org/r/10669
> The benchmarks are at
> https://docs.google.com/spreadsheet/ccc?key=0AochdzPoBmWodG9RTms1UG40YlNQd3ByUFpQY0FLWmc&pli=1#gid=10
> and while there are a few regressions (which will be fixed later regarding RandomAccessSparseVectors), it improves a lot of benchmarks as well as cleans up the code significantly.
> Part 1, the new function interfaces is merged. [Committed revision 1478853.]

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