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From "Xiangrui Meng (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-1359) SGD implementation is not efficient
Date Mon, 31 Mar 2014 08:18:14 GMT
Xiangrui Meng created SPARK-1359:
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             Summary: SGD implementation is not efficient
                 Key: SPARK-1359
                 URL: https://issues.apache.org/jira/browse/SPARK-1359
             Project: Spark
          Issue Type: Improvement
          Components: MLlib
    Affects Versions: 0.9.0
            Reporter: Xiangrui Meng


The SGD implementation samples a mini-batch to compute the stochastic gradient. This is not
efficient because examples are provided via an iterator interface. We have to scan all of
them to obtain a sample.



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