lambdas.rb

require 'benchmark'

def get_lambda
  lambda { }
end

def my_method; end

Benchmark.bmbm do |x|
  x.report { 1_000_000.times { method(:my_method) } }
  x.report { 1_000_000.times { lambda { } } }
  x.report { 1_000_000.times { get_lambda } }
  x.report { 1_000_000.times { Array.new } }
end

__END__

ruby-1.9.3-p327

Rehearsal ------------------------------------
   0.870000   0.020000   0.890000 (  0.893942)
   0.860000   0.040000   0.900000 (  0.903918)
   0.850000   0.040000   0.890000 (  0.889628)
   0.240000   0.000000   0.240000 (  0.234580)
--------------------------- total: 2.920000sec

       user     system      total        real
   0.910000   0.010000   0.920000 (  0.922781)
   0.810000   0.040000   0.850000 (  0.842371)
   0.900000   0.040000   0.940000 (  0.937668)
   0.250000   0.000000   0.250000 (  0.251040)

ruby-2.0.0-p353

Rehearsal ------------------------------------
   0.960000   0.020000   0.980000 (  0.986903)
   0.900000   0.030000   0.930000 (  0.934319)
   0.910000   0.050000   0.960000 (  0.963130)
   0.240000   0.000000   0.240000 (  0.249599)
--------------------------- total: 3.110000sec

       user     system      total        real
   0.930000   0.020000   0.950000 (  0.953224)
   0.880000   0.030000   0.910000 (  0.912183)
   0.930000   0.030000   0.960000 (  0.968376)
   0.220000   0.000000   0.220000 (  0.225340)

ruby-2.1.0

Rehearsal ------------------------------------
   0.930000   0.010000   0.940000 (  0.942092)
   1.110000   0.020000   1.130000 (  1.131873)
   1.020000   0.000000   1.020000 (  1.040798)
   0.240000   0.000000   0.240000 (  0.233958)
--------------------------- total: 3.330000sec

       user     system      total        real
   0.900000   0.010000   0.910000 (  0.914917)
   1.000000   0.010000   1.010000 (  1.010687)
   0.990000   0.010000   1.000000 (  0.998085)
   0.220000   0.000000   0.220000 (  0.219945)

jruby-1.7.10

Rehearsal ------------------------------------
   1.170000   0.040000   1.210000 (  0.447000)
   0.540000   0.020000   0.560000 (  0.294000)
   0.460000   0.030000   0.490000 (  0.274000)
   0.250000   0.010000   0.260000 (  0.147000)
--------------------------- total: 2.520000sec

       user     system      total        real
   0.090000   0.000000   0.090000 (  0.091000)
   0.160000   0.000000   0.160000 (  0.129000)
   0.140000   0.010000   0.150000 (  0.134000)
   0.110000   0.000000   0.110000 (  0.107000)