Ruby (Rails) Json parsers comparisson

json_parsers_benchmark.rb

require 'bundler'
require 'active_support/core_ext/object/deep_dup'
require 'active_model_serializers'
require 'roar/decorator'
require 'roar/json'
require 'rabl'
require 'jbuilder'
require 'fast_jsonapi'
require 'benchmark'
require 'ffaker'
require 'multi_json'
require 'oj'

# MultiJson.use :json_gem
MultiJson.use :oj

Post = Struct.new(:id, :author, :body, :draft) do
  include ActiveModel::Serializers::JSON
end

posts = []

(1..100_000).each do |id|
  posts << Post.new(id: id,
                    author: FFaker::Name.name,
                    body: FFaker::HipsterIpsum.paragraph,
                    draft: [true, false].sample)
end

class PostSerializer < ActiveModel::Serializer
  attributes :id, :author, :body, :draft
end

class PostNetflixSerializer
  include FastJsonapi::ObjectSerializer
  set_type :post
  attributes :author, :body, :draft
end

module PostsRepresenter
  include Roar::JSON

  property :id
  property :author
  property :body
  property :draft
end

def rabl_template
  '
    collection @posts
    attributes :id, :author, :body, :draft
  '
end

puts '_' * 88

def ams_test(posts)
  ActiveModel::Serializer::CollectionSerializer.new(posts, each_serializer: PostSerializer).to_json
end

def fast_jsonapi_test(posts)
  PostNetflixSerializer.new(posts).serialized_json
end

def roar_test(posts)
  PostsRepresenter.for_collection.prepare(posts).to_json
end

def rabl_test(posts)
  Rabl.render(posts, rabl_template)
end

def jbuilder_test(posts)
  Jbuilder.encode do |json|
    json.array! posts, :id, :author, :body, :draft
  end
end

puts 'with 100_000 records'

Benchmark.bm do |x|
  x.report('AMS          ') { ams_test(posts) }
  x.report('Roar         ') { roar_test(posts) }
  x.report('RABL         ') { rabl_test(posts) }
  x.report('Jbuilder     ') { jbuilder_test(posts) }
  x.report('fast_jsonapi ') { fast_jsonapi_test(posts) }
end

puts '_' * 88
puts "with 2000 records"

first2k = posts.take(2000)

Benchmark.bm do |x|
  x.report('AMS      ')     { ams_test(first2k) }
  x.report('Roar     ')     { roar_test(first2k) }
  x.report('RABL     ')     { rabl_test(first2k) }
  x.report('Jbuilder ')     { jbuilder_test(first2k) }
  x.report('fast_jsonapi ') { fast_jsonapi_test(first2k) }
end