require 'benchmark'

# Benchmarks for various object operations.
#
#                           user     system      total        real
# respond_to?           0.300000   0.000000   0.300000 (  0.301135)
# object_id             0.220000   0.000000   0.220000 (  0.221668)
# == nil                0.240000   0.000000   0.240000 (  0.244954)
# nil?                  0.220000   0.000000   0.220000 (  0.221454)
#
Benchmark.bm(20) do |x|

  n = 1000000
  o = Object.new

  x.report "respond_to?" do
    n.times { o.respond_to?(:object_id) }
  end

  x.report "object_id" do
    n.times { o.object_id }
  end

  x.report "== nil" do
    n.times { o == nil }
  end

  x.report "nil?" do
    n.times { o.nil? }
  end
end