GitHub user yanboliang opened a pull request:
https://github.com/apache/spark/pull/14519
[SPARK-16933] [ML] Fix AFTAggregator in AFTSurvivalRegression serializes
unnecessary data.
## What changes were proposed in this pull request?
Similar to ```LeastSquaresAggregator``` in #14109, ```AFTAggregator``` used
for ```AFTSurvivalRegression``` ends up serializing the ```parameters``` and
```featuresStd```, which is not necessary and can cause performance issues for
high dimensional data. This patch removes this serialization. This PR is highly
inspired by #14109.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yanboliang/spark spark-16933
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14519.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 #14519
----
commit d152a3a32ec08743b026ab5bd632b22909c6aa3f
Author: Yanbo Liang <[email protected]>
Date: 2016-08-06T13:37:37Z
Fix AFTAggregator in AFTSurvivalRegression serializes unnecessary data.
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