Improve validation performance - add cache (PoC - needs feedback)

[cyppe]

Here is the additional PoC for adding a simple cache for static rules as extended logic to PR #1043

Please share feedback as it's potentially a bit "hardcoded" with a list of unsafe rules to cache, maybe there is some better approach.

But the positive thing is that using the same benchmark as in PR #1043 it saves additionally 20% (around 200ms in time instead of about 258ms.