From: Chad Perrin <code@...>
Date: 2012-07-04T02:11:59+09:00
Subject: Re: ruby performance

On Tue, Jul 03, 2012 at 12:19:52PM +0900, Dan Connelly wrote:
> botp wrote in post #1067101:
> 
> This is a slight cheat, since my examples had addition independent of 
> loop control.  But nevertheless if I do the following:
> 
> i, j = 0,0
> while j < 10_000_000
>   i+=1
>   j+=1
> end
> puts "i = #{i}"

Why does j even exist in this?

    i = 0
    while j < 10_000_000
      i += 1
    end
    puts "i = #{i}"

Is the j there in some attempt to simulate a case where the loop
increment variable is not redundant with the operations taking place
within the loop?

-- 
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]