Computation times

00:00.261 total execution time for 3 files from examples/mlearning/classification_model:

Example	Time	Mem (MB)
Random forest classification (plot_random_forest_classification.py)	00:00.180	0.0
Classification API (plot_classification_api.py)	00:00.041	0.0
K nearest neighbors classification (plot_knn.py)	00:00.040	0.0