[lagrange] Deprecate PQkLocalFiniteElementCache in favor of LagrangeLocalFiniteElementCache
I propose to deprecate PQkLocalFiniteElementCache in favor of LagrangeLocalFiniteElementCache.
The latter implements a thread-safe get(gt) while the former does not. The latter constructs more finite elements but these classes should be constructed on a grid level rather than an element level, so there should be no relevant performance penalty.
Edited by Timo Koch