Github user zdh2292390 commented on the issue:
https://github.com/apache/spark/pull/16415
@jkbradley Accually, I see there are quite a few points to improve
MLlib GBDT.
First, we should stop using the RandomForest API and make a private API
for GBDT because there are a lot of redundancy or reduplicative operations in
RandomForest API such as buildMetadata ãfindSplitsBins and
convertToTreeRDD. These operations accually only need once for GBDT and not
necessary to do for every tree.
I'd like to change that but I need some advices to avoid break the
existing architectureã
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