Power to the People
On Zen and the Art of Ruby Programming Antonio Cangiano compares the speed of several Ruby implementations.
Interesting to see, that YARV is that much faster. On my particular problem, which mainly consists of message sends and each-loops, I have experienced only 10 % improvements over the standard ruby distribution. So I should review my implementation to gain improvements there, no chance to get it for free on other interpreters.
I mainly work with Rails, Backbone, and Bootstrap, but I am also good at picking up new frameworks, since I will probably know most of their concepts from other projects.