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From myui <...@git.apache.org>
Subject [GitHub] incubator-hivemall issue #51: [HIVEMALL-75] Support Sparse Vector Format as ...
Date Fri, 03 Mar 2017 12:09:06 GMT
Github user myui commented on the issue:

    https://github.com/apache/incubator-hivemall/pull/51
  
    @maropu
    
    To reduce memory consumption, I'm considering to replace `int[][] order` with `CompressedIntStream[]`.
    
    https://github.com/myui/incubator-hivemall/blob/7dba520cb709326edffb945dd925876433200a93/core/src/main/java/hivemall/smile/classification/RandomForestClassifierUDTF.java#L343
    
    `CompressedIntStream` should support streaming construction and should support streaming
decompression in 
    https://github.com/myui/incubator-hivemall/blob/7dba520cb709326edffb945dd925876433200a93/core/src/main/java/hivemall/smile/classification/DecisionTree.java#L551
    
    Any good algorithm or library for fast integer sequence compression/decompression?


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