Further down on the page: > Optimized for size and speed. This is not the same Ruby you'd use for building web apps with Rails (far from it). > DragonRuby is

Further down on the page: > Optimized for size and speed. This is not the same Ruby you'd use for building web apps with Rails (far from it). > DragonRuby is powered by highly optimized C code written by Ryan C. Gordon. He is one of the core maintainers of libSDL