Ruby is now ludicrously fast.
Ludicrious JIT is a Ruby 1.8 JIT which uses the libjit library that was written for dotgnu pnet's JIT core, very similar to what rubydium was trying to do. But libjit's come a long way in the last 3 (!) years, so if you're a Ruboi I suggest you try this out anyway.
It is a testament to the efforts of Rhys, Aleskey and Klaus to keep the library truly modular, reusable and independent of pnet's internals.--
The biggest difference between time and space is that you can't reuse time.
-- Merrick Furst