dog.rb

require 'benchmark'

class Dog
  [:woof, :bark, :hello].each do |word|
    define_method("say_#{word}!") do
      puts "Doggy says #{word}!"
    end
  end
end

Benchmark.bm(7) do |x|
  x.report { (1..100000).each { |x| Dog.new.say_woof! } }
end

# If you run this code, the headings will be obliterated by the output from
# the method, so just know that the last column (the most right-hand) is
# the calculation of 'real user time' and the column to focus on.

# I only bring this up because, while this works, its probably slow in that
# we are having to run the lookup chain each and every time. It would
# probably be faster to define any method we haven't seen before and then
# simply call that method, as opposed to each an every time having to go
# through the method_missing mechanic. That is the next iteration and to see
# how much time is saved.