17 Aug '13, 1pm

Headius: Refining Ruby

Current Ruby implementations are all built around method dispatch depending solely on the target object's type, and much of the caching and optimization we do depends on that. With refinements in play, we must also search and guard against types in the caller's context, which makes lookup much more complicated. Ideally we'd be able to limit this complexity to only refined calls, but because "using" can affect code far away from where it is called, we often have no way to know whether a given call might be refined in the future. This is especially pronounced in the "module_eval" case, where code that isn't even in the same class hierarchy as a refinement must still observe it.

Full article: http://blog.headius.com/2012/11/refining-ruby.html?spref=tw

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