def o.method vs class << self; def method for 1 object and 10000 method declarations

require "benchmark"
Benchmark.bm do |x|
  5.times do
    x.report do
      o = Object.new
      10000.times do
        def o.method; end
      end
    end
  end
end

      user     system      total        real
  0.080000   0.000000   0.080000 (  0.083388)
  0.040000   0.010000   0.050000 (  0.054322)
  0.040000   0.000000   0.040000 (  0.038894)
  0.040000   0.000000   0.040000 (  0.038702)
  0.040000   0.000000   0.040000 (  0.038113)

      user     system      total        real
  0.070000   0.000000   0.070000 (  0.084311)
  0.050000   0.000000   0.050000 (  0.044328)
  0.030000   0.000000   0.030000 (  0.039399)
  0.040000   0.010000   0.050000 (  0.039387)
  0.040000   0.000000   0.040000 (  0.066599)

require "benchmark"
Benchmark.bm do |x|
  5.times do
    x.report do
        o = Object.new
        class << o
          10000.times do
          def method; end
        end
      end
    end
  end
end

      user     system      total        real
  0.080000   0.000000   0.080000 (  0.109011)
  0.040000   0.010000   0.050000 (  0.039272)
  0.040000   0.000000   0.040000 (  0.038535)
  0.040000   0.000000   0.040000 (  0.040846)
  0.030000   0.010000   0.040000 (  0.051187)

      user     system      total        real
  0.050000   0.000000   0.050000 (  0.063544)
  0.030000   0.000000   0.030000 (  0.036843)
  0.040000   0.000000   0.040000 (  0.036338)
  0.040000   0.000000   0.040000 (  0.037811)
  0.030000   0.000000   0.030000 (  0.036806)

def o.method vs class << self; def method for 10000 objects and 10000 method declarations

require "benchmark"
Benchmark.bm do |x|
  5.times do
    x.report do
      10000.times do
        o = Object.new
        def o.method; end
      end
    end
  end
end

      user     system      total        real
  0.100000   0.000000   0.100000 (  0.096522)
  0.100000   0.000000   0.100000 (  0.111413)
  0.100000   0.000000   0.100000 (  0.104038)
  0.090000   0.000000   0.090000 (  0.095231)
  0.100000   0.000000   0.100000 (  0.099539)

      user     system      total        real
  0.130000   0.000000   0.130000 (  0.142741)
  0.100000   0.000000   0.100000 (  0.100665)
  0.100000   0.010000   0.110000 (  0.121455)
  0.100000   0.000000   0.100000 (  0.102085)
  0.090000   0.000000   0.090000 (  0.102203)

require "benchmark"
Benchmark.bm do |x|
  5.times do
    x.report do
      10000.times do
        o = Object.new
        class << o
          def method; end
        end
      end
    end
  end
end

      user     system      total        real
  0.100000   0.010000   0.110000 (  0.150145)
  0.100000   0.000000   0.100000 (  0.106283)
  0.110000   0.000000   0.110000 (  0.115765)
  0.110000   0.000000   0.110000 (  0.105696)
  0.100000   0.000000   0.100000 (  0.112317)

      user     system      total        real
  0.130000   0.000000   0.130000 (  0.133677)
  0.110000   0.010000   0.120000 (  0.113726)
  0.110000   0.000000   0.110000 (  0.105676)
  0.100000   0.000000   0.100000 (  0.106207)
  0.100000   0.000000   0.100000 (  0.104637)