scikit-learn/scikit-learn — pull request #2863 by arjoly (2014-02-15 21:55:23+00:00)
Title: [MRG] Cache features value for extra trees

Caching features values speed up extra trees by a fair amount for only 10 lines of code change.

Here some benchmarks results on the covertype dataset
```
Classifier train-time test-time error-rate
--------------------------------------------
master 52.4233s 0.4902s 0.0381
this pr 44.4372s 0.4892s 0.0381
```

Cheers !