Expand LSpec tests and add a Benchmarking suite

[mpenciak]

This issue tracks

1. Add a benchmarking suite to track performance gains/losses with changes in infrastructure
2. Expand the LSpec test suite to include arity 3 tests
3. It may be worth, in the process of expanding the LSpec tests, to re-structure the Sec/HashProfiles to avoid duplication between profiles whose only difference is arity.