From: Yukihiro Matsumoto Date: 2011-04-09T09:56:29+09:00 Subject: [ruby-core:35668] Re: caching of the ancestor chain Hi, In message "Re: [ruby-core:35667] Re: caching of the ancestor chain" on Sat, 9 Apr 2011 09:40:59 +0900, Xavier Noria writes: |So I wonder whether this is a design sacrifice for optimization purposes. Yes, kind of. If you can find a way to implement "proper" mixin relationship as efficient as it currently is, I'd love to take it. matz.