unbound_method.rb

# Original Benchmark used to consider whether to keep define_method or switch
# to instance_exec for Sinatra 1.3.0.
#
# == Ruby 1.8.7
# instan_exec   0.650000   0.000000   0.650000 (  0.650820)
# instan_eval   0.620000   0.000000   0.620000 (  0.621846)
# bind.call     0.140000   0.010000   0.150000 (  0.141961)
#
# == Ruby 1.9.2
#                   user     system      total        real
# instan_exec   0.830000   0.010000   0.840000 (  0.851241)
# instan_eval   0.800000   0.000000   0.800000 (  0.811791)
# bind.call     0.110000   0.000000   0.110000 (  0.119343)
#
# == Ruby 1.9.3
#                   user     system      total        real
# instan_exec   0.190000   0.010000   0.200000 (  0.338498)
# instan_eval   0.170000   0.000000   0.170000 (  0.177155)
# bind.call     0.130000   0.000000   0.130000 (  0.133703)
#
# == Rubinius 2.0.0dev
#                   user     system      total        real
# instan_exec   0.330260   0.004597   0.334857 (  0.350686)
# instan_eval   0.311549   0.011523   0.323072 (  0.917773)
# bind.call     0.096223   0.000337   0.096560 (  0.097297)
#
# == JRuby 1.6.5
# instan_exec   5.736000   0.000000   5.736000 (  5.736000)
# instan_eval   2.825000   0.000000   2.825000 (  2.825000)
# bind.call     0.154000   0.000000   0.154000 (  0.153000)

require 'benchmark'

class DSL
  def add(x) x + 10 end
end

num, value, block = 50000, 20, proc { add value }

DSL.send(:define_method, :bind_me, &block)
undbound_method = DSL.instance_method(:bind_me)
DSL.send(:remove_method, :bind_me)

Benchmark.bmbm do |x|
  x.report("instan_exec") { num.times { DSL.new.instance_exec(&block)       }}
  x.report("instan_eval") { num.times { DSL.new.instance_eval(&block)       }}
  x.report("bind.call")   { num.times { undbound_method.bind(DSL.new).call  }}
end