oj vs activemodel_serializer

oj_vs_activemodel_serializer.rb

require 'benchmark'
require 'oj'

class WrapperSerializer < ActiveModel::Serializer
  attributes :seq
end

class Wrapper
  include ActiveModel::SerializerSupport

  def initialize
    @seq = []
    100.times {@seq << A.new}
  end

  attr_accessor :seq
end

class A
  include ActiveModel::SerializerSupport

  def initialize
    @x = 1
    @y = 2
    @z = B.new
  end

  attr_accessor :x, :y, :z
end

class B
  include ActiveModel::SerializerSupport

  def initialize
    @x = 1
    @y = 2
    @z = C.new
  end

  attr_accessor :x, :y, :z
end

class C
  include ActiveModel::SerializerSupport

  def initialize
    @x = 1
    @y = 2
  end

  attr_accessor :x, :y, :z
end


Benchmark.realtime { Oj.dump(Wrapper.new ) }

Benchmark.realtime { Oj.dump(Wrapper.new, {:mode => :compat}) }

Benchmark.realtime { WrapperSerializer.new(Wrapper.new).as_json}
Benchmark.realtime { WrapperSerializer.new(Wrapper.new).to_json}