Check recursive behavior of clique optimization

[russell-taylor]

The Clique optimizer is calling all the way back to the FastOptimizer clique optimizer during its recursion because that's the function that is defined for _self. This has implications for cache behavior being turned on and off (off after each recursive call).

This has implications for additional work being done.

[russell-taylor]

Modified to explicitly call the same method, which increased the fraction of cache hits, which sped up processing.