Create simple performance-testing function

website/star_generator/generator/performance.py

@@ -0,0 +1,14 @@
+import stars
+import timeit
+
+def test(iterations=10):
+    statement = 'starry_sky.generate_sky()'
+    setup = 'starry_sky = stars.Sky()'
+    time = timeit.timeit(statement, setup, number=iterations, globals=globals())
+
+    each_iteration = time / iterations
+    return each_iteration
+
+
+if __name__ == '__main__':
+    print(test())