json_vs_eval.rb

require 'rubygems'
require 'rbench'
require 'json'


TIMES = 1000

json = '{"foo1":"bar1","foo2":"bar2","foo3":"bar3"}'
ruby = "{'foo1'=>'bar1', 'foo2'=>'bar2', 'foo3'=>'bar3'}"

RBench.run(TIMES) do
  column :json
  column :ruby
  column :diff, :title => 'ruby / json', :compare => [:ruby, :json]



  report 'Long Run' do
    json do 
      1000.times do |i| 
        JSON.parse(json)
      end
    end
    ruby do 
      1000.times do |i| 
        eval(ruby)
      end
    end
  end
end

#                     JSON |    RUBY | ruby / json |
# --------------------------------------------------
# Long Run          12.471 |  14.357 |       1.15x |