From: Paul Brannan <pbrannan@...>
Date: 2008-12-05T12:25:32+09:00
Subject: [ruby-core:20354] Re: Behavior: autoload calls rb_require()  directly

On Fri, Dec 05, 2008 at 09:56:19AM +0900, Charles Oliver Nutter wrote:
> All these optimizations are predicated on arriving at a static view of  
> the world at some point during execution. The ability to redefine  
> Fixnum#+, for example, means that we'll always need (at minimum) a guard  
> against + being overridden. If it's possible to eliminate the need for  
> those guards, our the potential for a static worldview expands, the  
> generated code gets smaller, and performance increases.

Instead of using guards you can recompile the world if someone ever
does override Fixnum#+.  I guess this means slightly higher memory
consumption, since some representation of the function needs to be kept
around just in case.

Paul