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https://issues.apache.org/jira/browse/MAHOUT-1578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14027681#comment-14027681
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ASF GitHub Bot commented on MAHOUT-1578:
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Github user sscdotopen commented on the pull request:
https://github.com/apache/mahout/pull/16#issuecomment-45732877
Can someone have a look at the changes? They passed unit-tests.
> Optimizations in matrix serialization
> -------------------------------------
>
> Key: MAHOUT-1578
> URL: https://issues.apache.org/jira/browse/MAHOUT-1578
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Reporter: Sebastian Schelter
> Fix For: 1.0
>
>
> MatrixWritable contains inefficient code in a few places:
>
> * type and size are stored with every vector, although they are the same for
> every vector
> * in some places vectors are added to the matrix via assign() in places
> where we could directly use the instance
>
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