Computation times

00:04.740 total execution time for 10 files from gallery/units:

Example	Time	Mem (MB)
Ellipse with units (ellipse_with_units.py)	00:01.013	0.0
Inches and centimeters (units_sample.py)	00:00.805	0.0
Radian ticks (radian_demo.py)	00:00.696	0.0
Bar demo with units (bar_demo2.py)	00:00.597	0.0
Evans test (evans_test.py)	00:00.473	0.0
Unit handling (units_scatter.py)	00:00.417	0.0
Annotation with units (annotate_with_units.py)	00:00.274	0.0
Group barchart with units (bar_unit_demo.py)	00:00.271	0.0
Artist tests (artist_tests.py)	00:00.187	0.0
Basic units (basic_units.py)	00:00.007	0.0