GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/4809
[SPARK-6055] [PySpark] fix incorrect DataType.__eq__
The eq of DataType is not correct, class cache is not use correctly
(created class can not be find by dataType), then it will create lots of
classes (saved in _cached_cls), never released.
Also, all same DataType have same hash code, there will be many object in a
dict with the same hash code, end with hash attach, it's very slow to access
this dict (depends on the implementation of CPython).
This PR also improve the performance of inferSchema (avoid the unnecessary
converter of object).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark leak2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4809.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4809
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commit 6c2909a7ed19d3f77c21a464e41f4160b822cfe0
Author: Davies Liu <[email protected]>
Date: 2015-02-27T07:39:59Z
fix incorrect DataType.__eq__
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