https://www.visualstudio.com/en-us/docs/test/performance-testing/_img/performance-testing/ic838830.png

make

Ruby

great again

API on Rails
Benchmark
How to speed up

# config/application.rb 

# require "rails"
# Pick the frameworks you want:
require "active_model/railtie"
# require "active_job/railtie"
require "active_record/railtie"
# require "action_controller/railtie"
# require "action_mailer/railtie"
# require "action_view/railtie"
# require "action_cable/engine"
# require "sprockets/railtie"
# require "rails/test_unit/railtie"

rails new awesome_ruby_app --api

class ApplicationController < JSONAPI::ResourceControllerMetal
  include Knock::Authenticable

  before_action :authenticate_user

  def head(type, options = {}) end # ...
end

gem "jsonapi-resources"

Reduce AR models instances

Started GET "/mail-logs" for ::1 at 2017-03-17 18:50:46 +0100
Processing by MailLogsController#index as API_JSON
  MailLog Load (0.4ms)  
        SELECT  "mail_logs".* FROM "mail_logs" 
        ORDER BY "mail_logs"."number" 
        DESC LIMIT $1 OFFSET $2  [["LIMIT", 20], ["OFFSET", 0]]
   (0.3ms)  SELECT COUNT(*) FROM "mail_logs"
Completed 200 OK in 7ms (Views: 0.0ms)

API on Rails
Benchmark
How to speed up

Ruby 2.4.0

Rails 5.0.2

Puma 3.8.1

(single process == one core)

Apache Benchmark 2.3

(10000 request burst on index action)

MBP 2015

Requests per second:    250.07 [#/sec] (mean)
Time per request:       3.999 [ms] (mean)
Time per request:       3.999 [ms] (mean, across all concurrent requests)


Percentage of the requests served within a certain time (ms)
  50%      4
  66%      4
  75%      4
  80%      4
  90%      4
  95%      5
  98%      5
  99%      6
 100%     39 (longest request) 

250 req / s

3.999ms / req

API on Rails
Benchmark
How to speed up

Lets rewrite it all with

xyz framework

Sinja 1.2.5

Sinatra 2.0.0.rc.1

Sequel 4.44.0

(ActiveSupport 5.0.2 -> jsonapi-serializers)

Puma 3.8.1

(single process == one core)

Apache Benchmark 2.3

(10000 request burst on index action)

MBP 2015'

# frozen_string_literal: true
require 'logger'
require 'sinatra'
require 'sequel'
require 'sinatra/jsonapi'

require 'sinja/sequel/helpers'

DB = Sequel.connect('postgres://localhost/cl-api_development')
DB.extension(:freeze_datasets)
DB.extension(:pagination)
DB.optimize_model_load = true

DB.loggers << Logger.new($stderr) if Sinatra::Base.development?

Sequel::Model.plugin :tactical_eager_loading

class MailLog < Sequel::Model
  many_to_one :category
  many_to_one :company
end

class Category < Sequel::Model
  one_to_many :mail_log
end

class Company < Sequel::Model
  one_to_many :mail_log
end

Sequel::Model.finalize_associations
Sequel::Model.freeze

class BaseSerializer
  include JSONAPI::Serializer
end

class MailLogSerializer < BaseSerializer
  attributes :number, :in_or_out, :document_date_on, :received_on, :external_number, :comment, :value_net, :value_vat

  has_one :category
  has_one :company
end

class CategorySerializer < BaseSerializer
  attributes :name

  has_many :mail_logs
end

class CompanySerializer < BaseSerializer
  attributes :name, :icon

  has_many :mail_logs
end

class MailLogs < Sinatra::Application
  register Sinatra::JSONAPI

  resource 'mail-logs' do
    index do
      MailLog.dataset
    end

  end
end

freeze_jsonapi

70 LOC of Ruby

Requests per second:    746.18 [#/sec] (mean)
Time per request:       1.340 [ms] (mean)
Time per request:       1.340 [ms] (mean, across all concurrent requests)
Transfer rate:          2731.85 [Kbytes/sec] received

Percentage of the requests served within a certain time (ms)
  50%      1
  66%      1
  75%      1
  80%      1
  90%      2
  95%      2
  98%      2
  99%      2
 100%      5 (longest request)

746 req / s

1.340 ms / req (median)

Ruby is

 fast enough

make ruby great again

Michał Czyż

@cs3b

Thank You!

https://twitter.com/@cs3b