GitHub user JoshRosen opened a pull request:
https://github.com/apache/spark/pull/14869
[SPARK-17301][SQL] Remove unused classTag field from AtomicType base class
There's an unused `classTag` val in the AtomicType base class which is
causing unnecessary slowness in deserialization because it needs to grab
ScalaReflectionLock and create a new runtime reflection mirror. Removing this
unused code gives a small but measurable performance boost in SQL task
deserialization.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/JoshRosen/spark remove-unused-classtag
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14869.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 #14869
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commit da28f089ecba338c8ae9ad53d3491007509fc72a
Author: Josh Rosen <joshro...@databricks.com>
Date: 2016-08-29T21:49:43Z
Remove unused classTag val from AtomicType
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