Lotus::Entity#initialize bench: metaprogramming vs iterative

entity_initialize_indifferent_access.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'benchmark/ips'
require 'lotus/utils/attributes'

class MetaProgrammingEntity
  def initialize(attributes = {})
    attributes = Lotus::Utils::Attributes.new(attributes)

    @a = attributes.get(:a)
    @b = attributes.get(:b)
    @c = attributes.get(:c)
    @d = attributes.get(:a)
    @e = attributes.get(:e)
    @f = attributes.get(:f)
    @g = attributes.get(:g)
    @h = attributes.get(:h)
    @i = attributes.get(:i)
    @j = attributes.get(:j)
  end
end

class IterativeEntity
  attr_writer :a, :b, :c, :d, :e, :f, :g, :h, :i, :j

  def initialize(attributes = {})
    attributes.each do |k, v|
      setter = "#{ k }="
      public_send(setter, v) if respond_to?(setter)
    end
  end
end

ATTRIBUTES = { 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5,
               'f' => 6, 'g' => 7, 'h' => 8, 'i' => 9, 'j' => 10 }

Benchmark.ips do |x|
  x.report('meta #initialize') { MetaProgrammingEntity.new(ATTRIBUTES) }
  x.report('iter #initialize') { IterativeEntity.new(ATTRIBUTES) }
end

__END__
Result:

Calculating -------------------------------------
    meta #initialize     7.437k i/100ms
    iter #initialize    11.623k i/100ms
-------------------------------------------------
    meta #initialize     84.850k (± 5.7%) i/s -    423.909k
    iter #initialize    137.717k (± 6.9%) i/s -    685.757k

Ruby:

    ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin13]

Hardware:

    Hardware Overview:

      Model Name: MacBook Air
      Model Identifier: MacBookAir5,2
      Processor Name: Intel Core i7
      Processor Speed: 2 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache (per Core): 256 KB
      L3 Cache: 4 MB
      Memory: 8 GB
      Boot ROM Version: MBA51.00EF.B02
      SMC Version (system): 2.5f9

Software:

    System Software Overview:

      System Version: OS X 10.9.5 (13F34)
      Kernel Version: Darwin 13.4.0
      Time since boot: 17 days 22:44

entity_initialize_symbol.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'benchmark/ips'
require 'lotus/utils/attributes'

class SymbolEntity
  def initialize(attributes = {})
    @a = attributes[:a]
    @b = attributes[:b]
    @c = attributes[:c]
    @d = attributes[:a]
    @e = attributes[:e]
    @f = attributes[:f]
    @g = attributes[:g]
    @h = attributes[:h]
    @i = attributes[:i]
    @j = attributes[:j]
  end
end

class IterativeEntity
  attr_writer :a, :b, :c, :d, :e, :f, :g, :h, :i, :j

  def initialize(attributes = {})
    attributes.each do |k, v|
      setter = "#{ k }="
      public_send(setter, v) if respond_to?(setter)
    end
  end
end

ATTRIBUTES = { a: 1, b: 2, c: 3, d: 4, e: 5,
               f: 6, g: 7, h: 8, i: 9, j: 10 }

Benchmark.ips do |x|
  x.report('symbol #initialize') { SymbolEntity.new(ATTRIBUTES) }
  x.report('iter #initialize')   { IterativeEntity.new(ATTRIBUTES) }
end

__END__
Calculating -------------------------------------
  symbol #initialize    42.997k i/100ms
    iter #initialize     9.567k i/100ms
-------------------------------------------------
  symbol #initialize    736.743k (±11.5%) i/s -      3.655M
    iter #initialize    113.413k (± 7.8%) i/s -    564.453k

Ruby:

    ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin13]

Hardware:

    Hardware Overview:

      Model Name: MacBook Air
      Model Identifier: MacBookAir5,2
      Processor Name: Intel Core i7
      Processor Speed: 2 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache (per Core): 256 KB
      L3 Cache: 4 MB
      Memory: 8 GB
      Boot ROM Version: MBA51.00EF.B02
      SMC Version (system): 2.5f9

Software:

    System Software Overview:

      System Version: OS X 10.9.5 (13F34)
      Kernel Version: Darwin 13.4.0
      Time since boot: 17 days 22:44

entity_initialize_symbolized.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'benchmark/ips'
require 'lotus/utils/hash'

class SymbolizedEntity
  def initialize(attributes = {})
    attributes = Lotus::Utils::Hash.new(attributes).symbolize!

    @a = attributes[:a]
    @b = attributes[:b]
    @c = attributes[:c]
    @d = attributes[:a]
    @e = attributes[:e]
    @f = attributes[:f]
    @g = attributes[:g]
    @h = attributes[:h]
    @i = attributes[:i]
    @j = attributes[:j]
  end
end

class IterativeEntity
  attr_writer :a, :b, :c, :d, :e, :f, :g, :h, :i, :j

  def initialize(attributes = {})
    attributes.each do |k, v|
      setter = "#{ k }="
      public_send(setter, v) if respond_to?(setter)
    end
  end
end

ATTRIBUTES = { 'a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5,
               'f' => 6, 'g' => 7, 'h' => 8, 'i' => 9, 'j' => 10 }

Benchmark.ips do |x|
  x.report('symbolized #initialize') { SymbolizedEntity.new(ATTRIBUTES) }
  x.report('iter #initialize')       { IterativeEntity.new(ATTRIBUTES) }
end

__END__
Calculating -------------------------------------
symbolized #initialize
                        10.291k i/100ms
    iter #initialize     9.574k i/100ms
-------------------------------------------------
symbolized #initialize
                        116.616k (± 5.3%) i/s -    586.587k
    iter #initialize    108.023k (±12.4%) i/s -    536.144k

Ruby:

    ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin13]

Hardware:

    Hardware Overview:

      Model Name: MacBook Air
      Model Identifier: MacBookAir5,2
      Processor Name: Intel Core i7
      Processor Speed: 2 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache (per Core): 256 KB
      L3 Cache: 4 MB
      Memory: 8 GB
      Boot ROM Version: MBA51.00EF.B02
      SMC Version (system): 2.5f9

Software:

    System Software Overview:

      System Version: OS X 10.9.5 (13F34)
      Kernel Version: Darwin 13.4.0
      Time since boot: 17 days 22:44