result.txt

Rehearsal -----------------------------------------------
instan_eval   0.258967   0.019441   0.278408 (  0.485533)
bind.call     0.078391   0.003822   0.082213 (  0.124251)
-------------------------------------- total: 0.360621sec

                  user     system      total        real
instan_eval   0.259275   0.004492   0.263767 (  0.309966)
bind.call     0.042689   0.000107   0.042796 (  0.043009)

undbound_method.rb

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_eval") { num.times { DSL.new.instance_eval(&block) }}
  x.report("bind.call") { num.times { undbound_method.bind(DSL.new).call }}
end