gistfile1.txt

require 'benchmark'

n = 1000000

Benchmark.bm do |x|
  x.report("'Old' string concat:"){ n.times{ "Hello, " + "world" } }

  class String
    alias_method :old_plus, :+
    def +(other)
      old_plus(other.to_s)
    end
  end

  class Symbol
    def +(other)
      self.to_s + other
    end
  end

  x.report("'New' string concat:"){ n.times{"Hello, " + "world"} }
  x.report("String + symbol:    "){ n.times{"Hello, " + :"world"} }
  x.report("Symbol + String:    "){ n.times{"Hello, " + :"world"} }

end