gistfile1.rb

require "rubygems"
require "rbench"
 
def omg_slow
  Array['one', 'two', 'three']
end
 
def omg_fast
  ['one', 'two', 'three']
end
 
RBench.run(10_000_000) do
  column :one, :title => "Using explicit array decl"
  column :two, :title => "Using implicit array decl"
  
  report "Array creation" do
    one { omg_slow }
    two { omg_fast }
  end
end

gistfile2.txt

                               Using explicity array decl | Using implicit array decl |
---------------------------------------------------------------------------------------
Array creation                                     18.628 |                    17.832 |