scikit-learn/scikit-learn — pull request #986 by bdholt1 (2012-07-27 14:17:52+00:00)
Title: [WIP] Lazy argsort for trees

Following a discussion on the mailing list about the cost complexity of trees issue #964 was created.

Strategy B proposed that we argsort features only when we need to in the node. This PR does just that.