Benchmarking derived rules (#48) #235

Job	Run time
Performance (hand_written)	18m 33s
basic	18m 22s
Performance (derived)	8m 4s
integration_testing/misc	34m 59s
integration_testing/diff_tests	1h 10m 30s
integration_testing/distributions	32m 52s
integration_testing/special_functions	2m 41s
integration_testing/array	1h 59m 53s
integration_testing/turing	14m 56s
	5h 20m 50s

Provide feedback