Improve performance by reducing cache copies

[joshbainbridge]

Currently cache member pointers are copied, but often refer to static data. There is potential to reduce this overhead, especially for CPU arch, and instead directly refer to the memory address of the internal tables the cache contains.

Currently the code base maintains C++14 to be compatible with more VFXRP versions. Ideally we would find a solution that would maintain this constraint, which rules out inlining of variables.