Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/1941#issuecomment-52244001
@chouqin Thanks for optimizing decision tree! As @manishamde mentioned,
@jkbradley has been working on decision tree optimization and bug fixes,
including this one and several others. Considering his following PRs will based
on his version #1950, do you mind helping review his code?
Btw, I'm fully responsible for duplicated efforts in MLlib. The correct
procedure of open-source contribution should be: 1) create a JIRA and describe
and discuss to work to be done, 2) get assigned for the work, 3) submit a PR.
However, few of us follows this procedure closely. Usually a JIRA is created
just before submitting the PR, this caused duplicated efforts. I will try to do
a better job at this.
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