Ruby calling method performance

test.rb

require 'benchmark/ips'

class Foo
  def bar; end
end

foo = Foo.new

Benchmark.ips do |x|
  x.config(:time => 5, :warmup => 2)

  x.report('default: ')        { foo.bar }
  x.report('send: ') { foo.send(:bar) }
  x.report('method call: ') { foo.method(:bar).call }
  x.report('eval: ') { eval('foo.bar') }

  x.compare!
end


#Warming up --------------------------------------
#           default:    252.827k i/100ms
#              send:    237.426k i/100ms
#       method call:    149.763k i/100ms
#              eval:     13.082k i/100ms
#Calculating -------------------------------------
#           default:       9.707M (± 2.1%) i/s -     48.543M in   5.002960s
#              send:       7.261M (± 4.0%) i/s -     36.326M in   5.012453s
#       method call:       2.833M (± 5.2%) i/s -     14.227M in   5.039212s
#              eval:     151.465k (± 4.4%) i/s -    758.756k in   5.020390s
#
#Comparison:
#           default: :  9707100.7 i/s
#              send: :  7260774.2 i/s - 1.34x  slower
#       method call: :  2832887.3 i/s - 3.43x  slower
#              eval: :   151464.9 i/s - 64.09x  slower