LuaJIT Hacking: Getting next() out of the NYI list

As a heavy LuaJIT user, this blog post is a really great read. Regardless of if this particular optimization will directly benefit my software, the post contains many insights into LuaJIT's performance and optimization characteristics.

It's great to see this kind of deep understanding of LuaJIT coming from people other than Mike Pall, until he can be cloned: https://github.com/LuaJIT/LuaJIT/issues/45