respond_to_vs_include.rb

# Fancy benchmark...
# is respond_to? so faster than include?

require 'benchmark'

n = 10_000_000
mock_methods = ('a'..'z').to_a

class Mock
end

mock_methods.each do |m|
  Mock.class_eval do
    send(:attr_accessor, m)
  end
end

mock = Mock.new
instance_meths = Mock.instance_methods(false)

Benchmark.bm(15) do |test|
  test.report('respond_to?: ') do
    n.times do
      mock.respond_to? :k
    end
  end
  test.report('include?: ') do
    n.times do
      instance_meths.include? :k
    end
  end
end

__END__

-- results: --
user system total real
respond_to?: 2.340000 0.000000 2.340000 ( 2.344671)
include?: 17.180000 0.000000 17.180000 ( 17.192215)