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From "Sebastian Schelter (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAHOUT-456) RowSimilarityJob should not produce SequentialAccessSparseVectors
Date Thu, 05 Aug 2010 20:52:23 GMT
RowSimilarityJob should not produce SequentialAccessSparseVectors
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                 Key: MAHOUT-456
                 URL: https://issues.apache.org/jira/browse/MAHOUT-456
             Project: Mahout
          Issue Type: Improvement
          Components: Math
            Reporter: Sebastian Schelter


RowSimilarityJob currently produces SequentialAccessSparseVectors with cardinality Integer.MAX_VALUE
wrapped inside VectorWritables.

It should better produce RandomAccessSparseVectors as some methods like assign(Vector) are
very slow on such SequentialAccessSparseVectors.

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