Computation times

00:15.196 total execution time for 2 files from examples/13-streamlines:

Example	Time	Mem (MB)
Compute and plot 3D streamlines (00_plot_3d_streamlines.py)	00:11.837	0.0
Compute and plot 2D streamlines (01_plot_surface_streamlines.py)	00:03.359	0.0