This month, I merged the Ruby's first JIT compiler. As it isn't ultra-fast yet, I haven't shared it deeply until the conference. But some of you guys kindly wrote great articles about it. Playing with ruby's new JIT: MJITRuby's New JITProbably they are easier to understand than my article. But I found several things to point out or announce. So I decided to write this article. What's "MJIT"?Let me