From: Eric Wong <normalperson@...>
Date: 2012-05-10T05:54:42+09:00
Subject: Re: How to make a given klass to include a module

I単aki Baz Castillo <ibc@aliax.net> wrote:
> NOTE: It must be efficient, I don't want to use eval and so.

Any time you modify a class/eigenclass (via include/extend), you lose
efficiency in MRI/YARV.  The runtime needs to invalidate its internal
caches for method lookup whenever classes are modified.