Short Rakudo.js update
Rakudo.js managed to parse (including running BEGIN blocks) all of the setting with an exception of one line that requires figuring out/measuring how to support uncached methods efficiently. (uncached methods are ones where we let the HOW handle the method call by running arbitrary code rather then installing a bunch of methods at once).
Generating the js code for the setting uncovered some performance issues like overflowing the stack by recursing too much (fixed) and running out of memory (not yet fixed).
I'm now focusing on getting a small prefix of the setting to fully compile and load so that I can use it measure and optimize the memory usage.