From: Urabe Shyouhei <shyouhei@...>
Date: 2007-09-25T09:23:54+09:00
Subject: [ruby-dev:31852] Re: [ ruby-Bugs-14195 ] Array instance method include? speed can be increased

たぶんスピード狂の人は興味あると思うので転送。

> Bugs item #14195, was opened at 2007-09-24 18:46
> You can respond by visiting: 
> http://rubyforge.org/tracker/?func=detail&atid=1698&aid=14195&group_id=426
>   

Array#include? が ((a & [x]).size > 0)より有意に遅いという話。たぶん==と
eql?の違いが差になって表れてるとか?