Clojure's `time` in Ruby for a bit of benchmarking sugar.

time.rb

require 'benchmark'

module Kernel
  ##
  # Evaluates expr and prints the time it took. Returns the value of expr.
  def time
    value = nil
    msecs = Benchmark.realtime do
      value = yield
    end
    puts "Elapsed time: #{msecs} msecs"
    value
  end
end

##
# Example usage:
time do
  sleep 5
  1 + 1
end  
#>> Elapsed time: 5.00057 msecs
#=> 2