bench_mongoid_vs_mongo_mapper.rb

gem 'mongo_mapper'
require 'mongo_mapper'

MongoMapper.database = 'benchmarking'

class Foo
  include MongoMapper::Document
  key :approved, Boolean
  key :count, Integer
  key :approved_at, Time
  key :expire_on, Date
  timestamps!
end
Foo.collection.remove


gem 'mongoid'
require 'mongoid'

connection = Mongo::Connection.new('localhost')
Mongoid.database = connection.db('benchmarking')

class Bar
  include Mongoid::Document
  include Mongoid::Timestamps

  field :approved, :type => Boolean
  field :count, :type => Integer
  field :approved_at, :type => Time
  field :expire_on, :type => Date
end
Bar.collection.remove

Benchmark.bm(5) do |x|
  puts('MongoMapper')
  ids = []
  x.report("write") do
    1000.times { |i| ids << Foo.create(:count => 0, :approved => true, :approved_at => Time.now, :expire_on => Date.today).id }
  end

  x.report("read ") do
    ids.each { |id| Foo.first(:id => id) }
  end

  x.report("all  ") do
    (ids.size / 10).times do |t|
      Foo.all(:approved => true, :page => t, :per_page => 10).each do |f|
        f.id
      end
    end
  end
end

Benchmark.bm(5) do |x|
  puts 'MongoId'
  ids = []
  x.report("write") do
    1000.times { |i| ids << Bar.create(:count => 0, :approved => true, :approved_at => Time.now, :expire_on => Date.today).id }
  end

  x.report("read ") do
    ids.each { |id| Bar.find(:first, :conditions => {:id => id}) }
  end

  x.report("all  ") do
    (ids.size / 10).times do |t|
      Bar.paginate(:conditions => {:approved => true, :page => t, :per_page => 10}).each do |f|
        f.id
      end
    end
  end
end

each HEAD version in 2009 01 12

           user     system      total        real
MongoMapper
write  1.310000   0.040000   1.350000 (  1.367452)
read   0.790000   0.050000   0.840000 (  0.949411)
all    0.120000   0.000000   0.120000 (  0.261779)
           user     system      total        real
MongoId
write  1.560000   0.040000   1.600000 (  1.606055)
read   0.430000   0.030000   0.460000 (  1.391272)
all    0.080000   0.000000   0.080000 (  0.376099)

result

           user     system      total        real
MongoMapper
write  4.130000   0.080000   4.210000 (  4.323286)
read   2.190000   0.080000   2.270000 (  2.545203)
all    0.050000   0.000000   0.050000 (  0.176148)
           user     system      total        real
MongoId
write  1.630000   0.040000   1.670000 (  1.712532)
read   0.520000   0.040000   0.560000 (  4.288453)
all    0.170000   0.010000   0.180000 (  0.697488)