From: Chad Perrin <perrin@...>
Date: 2006-01-12T10:58:25+09:00
Subject: Re: Looking up properties and speed

On Thu, Jan 12, 2006 at 10:03:30AM +0900, Eric Hodel wrote:
> On Jan 11, 2006, at 4:08 PM, Jonathan Leighton wrote:
> 
> >In Javascript, if one were to use the same property value twice or  
> >more,
> >one would store it in a local variable because looking up the property
> >slows things down.
> >
> >Is the situation the same in Ruby? Is there any speed difference  
> >between
> >these:
> >
> >def foo
> >  val = obj.prop
> >  puts val
> >  puts val
> >end
> >
> >def boo
> >  puts obj.prop
> >  puts obj.prop
> >end
> >
> >I assume not because I think the reason it's like that with Javascript
> >is because of the DOM (yeah, that's not strictly Javascript).
> 
> Why do you care?
> 
> Why not make clean, readable code and optimize the parts that are  
> causing the biggest slowdown?

Hey, I'm curious about the answer too, whether I ever use that knowledge
or not.  What's wrong with curiosity?

-- 
Chad Perrin [ CCD CopyWrite | http://ccd.apotheon.org ]

"A script is what you give the actors.  A program
is what you give the audience." - Larry Wall