[PATCH 1/4] [YGrid] Add superIndex() methods to calculate a superindex for a given coordinate
[PATCH 2/4] [YaspGridEntity] Use new superIndex() method for calculating sub-indices
[PATCH 3/4] [YaspGridEntity] Avoid unnecessary branching
[PATCH 4/4] [YaspGrid] Cache binomial coefficients and bitsets for entities
Cleanup the performance engineering code