Fluxus - live coding system built on PLT Scheme
pawfal.org
pawfal.org
I tend to think these performance concerns are overstated. However, if they will insist on believing these myths, then OCaml might be the right way to go. Its, generally, just as fast as C++. Often faster. And it has some great libraries for graphics.
Is anyone here working with OCaml?
If you want to see a move towards OCaml, write great apps or useful tools.
Regardless, I'll take that as a "no".
(note - also written by a Lisp wannabe who knows about Naughty Dog)