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https://issues.apache.org/jira/browse/MAHOUT-1202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14128972#comment-14128972
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ASF GitHub Bot commented on MAHOUT-1202:
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Github user dlyubimov commented on the pull request:
https://github.com/apache/mahout/pull/44#issuecomment-55169986
Aha. here is the stuff
https://issues.apache.org/jira/browse/MAHOUT-1202
https://docs.google.com/document/d/1g1PjUuvjyh2LBdq2_rKLIcUiDbeOORA1sCJiSsz-JVU/edit#heading=h.koi571fvwha3
> 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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