the comments are the most interesting part of this. original poster makes lots of assumptions, many of which are challenged by people who know the raduko code.
Yes the OP comments throughout contain a lot of historical inaccuracies about Parrot & Rakudo.
The ParrotVM team did publish a precise roadmap a few years back and I believe the optimization wasn't due to circa version 3 or 4? (ParrotVM is currently at 2.6).
NB. Unfortunately I can't find the original roadmap I'm referring to at moment because it may not have made the Rakudo move from svn to git?
