Github user ahirreddy commented on a diff in the pull request:
https://github.com/apache/spark/pull/1023#discussion_r13572014
--- Diff: python/pyspark/sql.py ---
@@ -346,7 +347,7 @@ def _toPython(self):
# TODO: This is inefficient, we should construct the Python Row
object
# in Java land in the javaToPython function. May require a custom
# pickle serializer in Pyrolite
- return RDD(jrdd, self._sc, self._sc.serializer).map(lambda d:
Row(d))
+ return RDD(jrdd, self._sc, PickleSerializer()).map(lambda d:
Row(d))
--- End diff --
This might actually be slower, in some cases. If I understand it correctly,
it won't use a batch-serializer if there is one specified
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