I'm sorry I'm not making myself clear in what my goal is.
First off I wanted to know if there were an easy and understandble way to filter out references, so that it was transparent that it was the hash from the caller that was being worked on. This was to archieve a way to hide the "gory" details about references ;)
When I figured out that the only way to do this is to alter the symbol table (which is a hell of a lot more difficult to read and understand), I was curious if there were a visible speed difference, which I gladly saw there was not.
ps. As