miloops

$:.unshift("/Users/miloops/Workspace/github/miloops/rails/activerecord/lib")
$:.unshift("/Users/miloops/Workspace/github/railsarel/lib")
require 'active_record'

ActiveRecord::Base.establish_connection(
  :adapter => "sqlite3",
  :database  => ":memory:"
)

ActiveRecord::Schema.define do

miloops

IM
                                                       |      AR |
------------------------------------------------------------------
Model#id                                       x100000 |   0.796 |
Model.new (instantiation)                       x10000 |   0.303 |
Model.new (setting attributes)                  x10000 |   0.746 |
Model.first                                     x10000 |   3.740 |
Model.all limit(100)                             x1000 |  13.367 |
Model.all limit(100) with relationship           x1000 |  16.412 |
Model.all limit(10,000)                            x10 |  12.141 |

miloops

rails/master


                                                       |      AR |
------------------------------------------------------------------
Model#id                                       x100000 |   0.726 |
Model.new (instantiation)                       x10000 |   0.296 |
Model.new (setting attributes)                  x10000 |   0.718 |
Model.first                                     x10000 |   3.346 |
Model.all limit(100)                             x1000 |   8.772 |

miloops

class WeakHash
  def initialize(cache = Hash.new)
    @cache = cache
    @key_map = {}
    @rev_cache = Hash.new{|h,k| h[k] = {}}
    @reclaim_value = lambda do |value_id|
      if value = @rev_cache.delete(value_id)
        value.each_key{|key| @cache.delete key}
      end
    end

miloops

class WeakHash
  def initialize(cache = Hash.new)
    @cache = cache
    @key_map = {}
    @reclaim_key = lambda do |key_id|
      delete(@key_map[key_id]) unless @cache.empty?
    end
  end

   def [](key)

miloops

-- create_table(:accounts)
   -> 0.0264s
-- create_table(:posts)
   -> 0.0008s
-- create_table(:comments)
   -> 0.0010s
==================================================
ActiveRecord::IdentityMap.enabled: false
Objects:
Warmup: 1110266 allocations | 40078000 bytes

miloops

$:.unshift("/Users/miloops/Workspace/github/miloops/rails/activerecord/lib")
$:.unshift("/Users/miloops/Workspace/github/swistak/weakling/lib")
$:.unshift("/Users/miloops/Workspace/github/railsarel/lib")
require 'active_record'

ActiveRecord::Base.establish_connection(
  :adapter => "sqlite3",
  :database  => ":memory:"
)

miloops

def instances(&block)
  GC.enable_stats
  GC.clear_stats
  block.call
  warmup_objs = GC.num_allocations
  warmup_bytes = GC.allocated_size
  GC.clear_stats
  block.call
  puts "=" * 50
  puts "ActiveRecord::IdentityMap.enabled: #{ActiveRecord::IdentityMap.enabled}"

miloops

def instances(&block)
  GC.enable_stats
  GC.clear_stats
  block.call
  warmup_objs = GC.num_allocations
  warmup_bytes = GC.allocated_size
  GC.clear_stats
  block.call
  puts "=" * 50
  puts "ActiveRecord::IdentityMap.enabled: #{ActiveRecord::IdentityMap.enabled}"

miloops

def instances(&block)
  GC.enable_stats
  GC.clear_stats
  block.call
  warmup_objs = GC.num_allocations
  warmup_bytes = GC.allocated_size
  GC.clear_stats
  block.call
  puts "=" * 50
  puts "ActiveRecord::IdentityMap.enabled: #{ActiveRecord::IdentityMap.enabled}"