You know, did you benchmark this first? I mean heck, we're talking about two piddly subroutine calls here (once to unset strict refs, once to set it again). There are probably better things to optimize than this.

__SIG__
use B;
printf "You are here %08x\n", unpack "L!", unpack "P4", pack
  "L!", B::svref_2object(sub{})->OUTSIDE;
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