require 'rubygems'
require 'benchmark'

test_array = %w(hamburger cheeseburger goatburger veggieburger lettuce tomato ketchup superburger)

Benchmark.bm do |x|
  x.report { 1000000.times { test_array.grep(/burger/) } }
  x.report { 1000000.times { test_array.select { |item| item.match(/burger/) } } }
end

#      user     system      total        real
#  4.230000   0.030000   4.260000 (  4.286455)
#  7.680000   0.020000   7.700000 (  7.854752)