GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/9104
[SPARK-11088] [SQL] Merges partition values using UnsafeProjection
`DataSourceStrategy.mergeWithPartitionValues` is essentially a projection
implemented in a quite inefficient way. This PR optimizes this method with
`UnsafeProjection` to avoid unnecessary boxing costs.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark
spark-11088.faster-partition-values-merging
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9104.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 #9104
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commit 23a0fc2ef86daa8faa785ef2ea3f1d7b5d1b692c
Author: Cheng Lian <l...@databricks.com>
Date: 2015-10-13T18:04:36Z
Merges partition values using UnsafeProjection
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