From: Gavin <thinkersplayground@...>
Date: 2010-02-16T01:30:21+09:00
Subject: Re: Parallel assignments vs. Serial assigments

(My results show that parallel assignment is slower in this test)

On Feb 15, 4:23 pm, Gavin <thinkersplaygro...@googlemail.com> wrote:
> Hey all
>
> I was always under the impression that parallel assignments in Ruby
> were faster than assigning variables individually.
>
> Recently I was curious to see how much faster it was and decided to
> test it:
>
> class One
>
>   def initialize(first_name, last_name)
>     @first_name = first_name
>     @last_name  = last_name
>   end
>
> end
>
> class Two
>
>   def initialize(first_name, last_name)
>     @first_name, @last_name = first_name, last_name
>   end
>
> end
> require "rubygems"
> require "benchmark"
>
> Benchmark.bmbm do |test|
>   test.report("serial") do
>     10000.times { |n| var =  One.new("gavin#{n}", "morrice")}
>   end
>   test.report("parallel") do
>     10000.times { |n| var =  Two.new("gavin#{n}", "morrice")}
>   end
> end
>
> The results I get show that it's slower (in both Ruby 1.8.7 and Ruby
> 1.9.1)
>
> Can anyone elaborate?
>
> Thanks