dm_1.0.2_perf_regression.rb

require 'rubygems'

gem 'dm-core', '0.10.2'
gem 'dm-migrations', '0.10.2'
gem 'dm-timestamps', '0.10.2'

require 'dm-core'
require 'dm-migrations'
require 'dm-timestamps'

require 'dm-migrations/migration_runner'
require 'benchmark'

DataMapper.setup(:default, 'sqlite3::memory') # createdb test

class Course
  include DataMapper::Resource

  property :id, Serial
  property :name, String

  has n, :exams
end

class Exam
  include DataMapper::Resource

  property :id, Serial

  belongs_to :course
end

#DataMapper.finalize
DataMapper.auto_migrate!

Benchmark.bm do |x|
  x.report do
    1000.times do |i|
      course = Course.create(:name =>"Ruby #{i}")
      Exam.create(:course => course)
    end
  end
end

results.txt

DM 0.10.2:

  user      system      total        real
4.250000   1.130000   5.380000 ( 36.003685)


DM master (02/02/2011):

  user      system      total        real
6.850000   1.150000   8.000000 ( 36.257449)