[logfromblammo]

That isn't actually important unless you have multiple algorithms, which is when you create an ISquareRootApproximator interface, and have NewtonRaphsonAlgorithm and any other classes implement it.

Then you can have them duke it out running identical unit tests in the profiler.

That creates a clean separation between the people who just need to know what a function does and those that need to know how that function works. People who just need an approximated square root fast can understand perfectly well what ISquareRootApproximator.ApproximateSquareRoot( r ) does, and don't necessarily care whether your "get me a square root approximator" function returns a NewtonRaphsonAlgorithm, or a CORDICAlgorithm, or a BitshiftsMagicNumbersAndLookupTablesAlgorithm, or something else, so long as it approximates a square root.