speed_test

Speed test results

With switchcases that have 8 clauses, repeated 10^7 times per test.

Without the transformer	With the transformer	Winner
0.5013423 s	0.4695772 s	with
0.4608118 s	0.5447016 s	without
0.4538083 s	0.4186085 s	with
0.4700488 s	0.4543332 s	with
0.4649994 s	0.5109048 s	without
0.5083704 s	0.4573691 s	with
0.4666383 s	0.5028893 s	without
0.5342452 s	0.6151212 s	without

Conclusion

The difference is unnoticable (at most 10ns) and the winner is random.