I don't know Ruby, so I had never paid JRuby any attention or heard of any of this, despite writing VMs for fun and following PyPy development. This talk was am

I don't know Ruby, so I had never paid JRuby any attention or heard of any of this, despite writing VMs for fun and following PyPy development. This talk was amazing. The fact that you include a C parser and interpreter (CTruffle) [1], can parse (some) MRI Ruby extensions written in C, and treat it just same as Ruby and inline/partially evaluate/etc everything together, and hence run faster than compiled C extensions, is just mind blowing. And it's all JIT compiled to JVM bytecode which then gets JIT compiled by HotSpot, what an incredibly complex stack. [1] http://chrisseaton.com/rubytruffle/cext/ http://chrisseaton.com/rubytruffle/cext/ It makes me wonder about writing a JIT compiler to produce LuaJIT bytecode, since I'm currently working on AOT compilation of a dynamic language to LuaJIT bytecode.