roar vs ams vs rabl vs jbuilder Raw. (json_gem, oj)

bench.rb

require 'bundler'
require 'active_model_serializers'
require 'roar/decorator'
require 'roar/json'
require 'rabl'
require 'jbuilder'
require 'benchmark'
require 'ffaker'
require 'multi_json'
require 'oj'


#th 100_000 records
#       user     system      total        real
#AMS  9.370000   0.170000   9.540000 (  9.571351)
#Roar 17.550000   0.230000  17.780000 ( 17.849567)
#RABL  3.330000   0.070000   3.400000 (  3.409328)
#JB  9.870000   0.130000  10.000000 ( 10.036196)
#with 2000 records
#       user     system      total        real
#AMS  0.150000   0.000000   0.150000 (  0.152790)
#Roar  0.210000   0.000000   0.210000 (  0.211740)
#RABL  0.040000   0.010000   0.050000 (  0.034003)
#JB  0.130000   0.000000   0.130000 (  0.129387)#MultiJson.use :json_gem
#MultiJson.use :json_gem


#with 100_000 records
#       user     system      total        real
#AMS  9.040000   0.160000   9.200000 (  9.236191)
#Roar 11.380000   0.130000  11.510000 ( 11.541029)
#RABL  3.100000   0.070000   3.170000 (  3.191567)
#JB  2.380000   0.070000   2.450000 (  2.458665)
#with 2000 records
#       user     system      total        real
#AMS  0.130000   0.000000   0.130000 (  0.135257)
#Roar  0.130000   0.000000   0.130000 (  0.126143)
#RABL  0.040000   0.000000   0.040000 (  0.038177)
#JB  0.020000   0.000000   0.020000 (  0.028446)
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

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 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('JB') { jbuilder_test(posts) }
end

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('JB') { jbuilder_test(first2k) }
end