GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/12640
[SPARK-14850][ML] specialize array data for VectorUDT/MatrixUDT
## What changes were proposed in this pull request?
This PR adds `IntArrayData` and `DoubleArrayData`, so that we don't need to
box primitive arrays and unbox them back for VectorUDT/MatrixUDT.
## How was this patch tested?
existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark ml
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12640.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 #12640
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commit 4ce27ada75674d85344e5c2a5d6755035bc8276f
Author: Wenchen Fan <wenc...@databricks.com>
Date: 2016-04-23T15:10:47Z
specialize array data
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