Ruby interpreters, method execution

I'm doing some research into how different Ruby interpreters do 开发者_开发技巧method execution (e.g. when you call a method in ruby, what steps does the interpreter take to find and execute it, and which structures are involved in this). I am trying to compare the performance of the different approaches being used.

The interpreters I'm looking into are: MRI, YARV, JRuby, Rubinius, Ruby EE

I am looking for any general pointers about which files in the interpreter source I should check out, and any other general information about this topic that you guys can provide.

Thanks!

This article is a really good description of method dispatching in JRuby. It is nicely complemented by the JRuby Wiki page describing its internals.