Computation times

00:03.130 total execution time for 5 files from auto_examples/graphviz_layout:

Example	Time	Mem (MB)
Atlas (plot_atlas.py)	00:01.969	0.0
Giant Component (plot_giant_component.py)	00:00.761	0.0
Lanl Routes (plot_lanl_routes.py)	00:00.192	0.0
Decomposition (plot_decomposition.py)	00:00.130	0.0
Circular Tree (plot_circular_tree.py)	00:00.078	0.0