From: Rich Kilmer <rich@...>
Date: 2001-10-10T22:26:16+09:00
Subject: [ruby-talk:22382] Re: include vs. extend



> -----Original Message-----
> From: matz@ev.netlab.jp [mailto:matz@ev.netlab.jp]On Behalf Of Yukihiro
> Matsumoto
> Sent: Wednesday, October 10, 2001 1:20 AM
> To: ruby-talk ML
> Subject: [ruby-talk:22374] Re: include vs. extend
> 
> 
> Hi,
> 
> In message "[ruby-talk:22332] Re: include vs. extend"
>     on 01/10/10, Paul Brannan <pbrannan@atdesk.com> writes:
> 
> |So in 3/4 cases, extend is (consistently) faster.  Why is this?
> 
> I don't know.  If I'm right include and extend create same structures,
> that only differ that extend creates per object structures.
> 
> 							matz.


I do not understand the internals of Ruby, I'm going of intuition...

If I (include) within a class a module there is a new "hidden" combined class created that I then instantiate with objects.  If I (extend) an object there is a new "hidden" combined class created for that object...is that right?  I would think that doing this per object would have more overhead (because you are creating more of these classes/structures) vs. per class (where you create the class/structure once).

-Rich