Implications when caching is disabled

[jankowtf]

Caching can be disabled by setting cache = FALSE.

Theoretically, this should result in shorter runtimes as less code needs to be executed (maintaining the registry, comparing checksums, integrity checks etc.)

However, current profiling paradoxically suggests that the retrieval referencing reactive objects with refrences to other objects takes longer than as when caching is enabled.

Re-investigate this!