(As it happens I did read the FAQ)
Since "magic" has a specific meaning within perl, can I suggest you use some other term?
To expand upon the RPython issue: RPython is not intended
for writing general code; its intended specifically only
for writing interpreters; within that limited use case, it makes sense to have a language similar to python, but highly restricted (in particular, static typing).
In the RPerl case, you seem to be targetting it towards general code, where you mark limited sections of your code as targets for optimisation. The problem seems to me that
your restrictions are so severe (no regexes!!!!) that virtually no real-life code is amenable to any speed-ups.