1_output.txt

# dm-core 0.10.2 <- our current point
creating 20 models took:   0.890000   0.250000   1.140000 (  1.147287)

# dm-core v1.0.0 
creating 20 models took:   1.350000   0.440000   1.790000 (  1.791719)

# dm-core e7b5f186 <- somewhere after 1.0.0, time is climbing
creating 20 models took:   1.540000   0.520000   2.060000 (  2.061627)

# dm-core ad298724 <- git bisect tells me this is the bad one
creating 20 models took:   2.290000   0.850000   3.140000 (  3.141820)

2_demo_script.rb

#!/usr/bin/ruby -rubygems

# Gems pegged at edge
require 'dm-core'       # 75c67e61
require 'dm-migrations' # 69551c93

# Gems pegged at 1.0.0
require 'dm-types'
require 'dm-timestamps'
require 'dm-validations'
require 'dm-serializer'
require 'dm-aggregates'
require 'dm-ar-finders'
require 'dm-transactions'
# + do_mysql 0.9.12

require 'benchmark'

foo = Benchmark.measure {
  20.times do |n|
      class << Class.new
          include ::DataMapper::Resource

          10.times do |x|
              property "str#{x}".to_sym, String
          end

          10.times do |x|
              property "num#{x}".to_sym, Integer
          end

          10.times do |x|
              property "bool#{x}".to_sym, Boolean
          end

          10.times do |x|
              property "decimal#{x}".to_sym, Decimal, :scale => 2, :precision => 6
          end

          10.times do |x|
              property "float#{x}".to_sym, Float
          end
      end
  end
}

puts "creating #{a} models took: #{foo}"