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From mateiz <...@git.apache.org>
Subject [GitHub] spark pull request: (WIP) SPARK-2045 Sort-based shuffle
Date Wed, 23 Jul 2014 23:25:21 GMT
Github user mateiz commented on the pull request:

    https://github.com/apache/spark/pull/1499#issuecomment-49949660
  
    No, we only read one value at a time. If you're doing something like groupByKey, the combine
function may create an ArrayBuffer or stuff like that, but that's only for the key actively
being read. As soon as one stream moves on to the next key, we read the first key-value pair
in it but stop reading others.


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