Computation times

00:03.466 total execution time for 3 files from examples/mlearning/dimension_reduction:

Example	Time	Mem (MB)
Mixture of experts with PCA (plot_moe_burgers.py)	00:02.795	0.0
Proper orthogonal decomposition (POD) (plot_klsvd_burgers.py)	00:00.387	0.0
Principal component analysis (PCA) (plot_pca_burgers.py)	00:00.283	0.0