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[jira] [Created] (ARROW-2595) [Plasma] operator[] creates entries in map

Philipp Moritz created ARROW-2595:

             Summary: [Plasma] operator[] creates entries in map
                 Key: ARROW-2595
                 URL: https://issues.apache.org/jira/browse/ARROW-2595
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Plasma (C++)
            Reporter: Philipp Moritz

* Problem

 ** Using object_get_requests_[object_id] will produce a lot of garbage data in PlasmaStore::return_from_get. During the measurement process, we found that there was a lot of memory growth in this point.
 * Solution

 ** Use iterator instead of operator []

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