Conexão Kinghost - Otimização Prematura

1. PREMATURE OPTIMIZATION The Root of ALL Evil @akitaonrails

2. @akitaonrails

3. Rubyconf Brasil 2016 – September 23 - 24

4. Rubyconf Brasil 2016 – September 23 - 24

5. September 23 - 24 @rubyconfbr

6. PREMATURE OPTIMIZATION The Root of ALL Evil @akitaonrails

7. “Premature Optimization is the Root of All Evil” - Don Knuth

8. SPA e-commerce

9. SPA e-commerce http://www.loja.com.br/#!/produtos/item-001

10. SPA e-commerce http://www.loja.com.br/#!/produtos/item-001 http://www.loja.com.br/?_escaped_fragment_=/produtos/item-001

11. High Level Numbers

12. Client #1

13. $ 4,000

14. $ 4,000 ($ 7 MI/yr revenue - 0.68%)

15. Client #2

16. $ 100,000+

17. $ 100,000+ ($ 800 MI/yr revenue - 0.15%)

18. • Minimum IT Cost:

19. • Minimum IT Cost: • USD 1000 - Cloud Services

20. • Minimum IT Cost: • USD 1000 - Cloud Services • USD 3000 - 1 Developer

21. • Minimum IT Cost: • USD 1000 - Cloud Services • USD 3000 - 1 Developer • USD 4000 - 1“Responsible”(Manager, Marketing, etc)

22. • Minimum IT Cost: • USD 1000 - Cloud Services • USD 3000 - 1 Developer • USD 4000 - 1“Responsible”(Manager, Marketing, etc) • Total: USD 8.000/month (USD 96.000/year)

23. • Minimum IT Cost: • USD 1000 - Cloud Services • USD 3000 - 1 Developer • USD 4000 - 1“Responsible”(Manager, Marketing, etc) • Total: USD 8.000/month (USD 96.000/year) • Minimum Business Requirement:

24. • Minimum IT Cost: • USD 1000 - Cloud Services • USD 3000 - 1 Developer • USD 4000 - 1“Responsible”(Manager, Marketing, etc) • Total: USD 8.000/month (USD 96.000/year) • Minimum Business Requirement: • Revenue: > USD 2 MI / year

25. • Minimum IT Cost: • USD 1000 - Cloud Services • USD 3000 - 1 Developer • USD 4000 - 1“Responsible”(Manager, Marketing, etc) • Total: USD 8.000/month (USD 96.000/year) • Minimum Business Requirement: • Revenue: > USD 2 MI / year • IT Cost / Revenue ratio: < 5%

26. Increase Revenue > Lower Costs

27. Open > Proprietary (prefer“Best of Breed”)

28. Cloud > On-Premise (Infrastructure/Platform as a Service)

29. SaaS > IaaS (avoid doing yourself)

30. Databases

31. E-mail

32. Performance

33. Search

34. Async Jobs

35. Monitoring

36. SEO & SEM (should not be Astrology!)

37. • /do/you/have/friendly/urls?

38. • /do/you/have/friendly/urls? • sitemap.xml?

39. • /do/you/have/friendly/urls? • sitemap.xml? • Proper HTTP 301 Redirections?

40. • /do/you/have/friendly/urls? • sitemap.xml? • Proper HTTP 301 Redirections? • Social Network buttons?

41. • /do/you/have/friendly/urls? • sitemap.xml? • Proper HTTP 301 Redirections? • Social Network buttons? • Periodic ORIGINAL CONTENT publishing?

42. • /do/you/have/friendly/urls? • sitemap.xml? • Proper HTTP 301 Redirections? • Social Network buttons? • Periodic ORIGINAL CONTENT publishing? • No duplication duplication of content content?

43. • /do/you/have/friendly/urls? • sitemap.xml? • Proper HTTP 301 Redirections? • Social Network buttons? • Periodic ORIGINAL CONTENT publishing? • No duplication duplication of content content? • THEN OK!

44. I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. Codebase One codebase tracked in revision control, many deploys Dependencies Explicitly declare and isolate dependencies Config Store config in the environment Backing services Treat backing services as attached resources Build, release, run Strictly separate build and run stages Processes Execute the app as one or more stateless processes Port binding Export services via port binding Concurrency Scale out via the process model Disposability Maximize robustness with fast startup and graceful shutdown Dev/prod parity Keep development, staging, and production as similar as possible Logs Treat logs as event streams Admin processes Run admin/management tasks as one-oﬀ processes

45. y = x * 320

46. y = x * 320 y = (x << 8) + (x << 6)

47. • NO Test Suite with below 70% coverage

48. • NO Test Suite with below 70% coverage • NO CodeClimate below 3.0 rating

49. • NO Test Suite with below 70% coverage • NO CodeClimate below 3.0 rating • NO source code file with hundreds of LOC

50. • NO Test Suite with below 70% coverage • NO CodeClimate below 3.0 rating • NO source code file with hundreds of LOC • NO COPY AND PASTE EVERYWHERE!!!

51. • NO Test Suite with below 70% coverage • NO CodeClimate below 3.0 rating • NO source code file with hundreds of LOC • NO COPY AND PASTE EVERYWHERE!!! • NO functions with more than 1 page down

52. • NO Test Suite with below 70% coverage • NO CodeClimate below 3.0 rating • NO source code file with hundreds of LOC • NO COPY AND PASTE EVERYWHERE!!! • NO functions with more than 1 page down • NO table with dozens of fields

53. • NO Test Suite with below 70% coverage • NO CodeClimate below 3.0 rating • NO source code file with hundreds of LOC • NO COPY AND PASTE EVERYWHERE!!! • NO functions with more than 1 page down • NO table with dozens of fields • NO hours to clone, setup and deploy!!

54. Spree: 68k LOC 40k are Specs! (60%)

55. Magento2: 300k LOC 127k are Specs! (< 30%)

56. Maintainability > Performance

57. PRIORITIES!

58. • SQL N+1 Queries

59. • SQL N+1 Queries • Too much SQL

60. • SQL N+1 Queries • Too much SQL • Too much SQL LIKE instead of Elastic

61. • SQL N+1 Queries • Too much SQL • Too much SQL LIKE instead of Elastic • Lack of proper SQL indexes

62. • SQL N+1 Queries • Too much SQL • Too much SQL LIKE instead of Elastic • Lack of proper SQL indexes • Too much unused code that was not removed

63. • SQL N+1 Queries • Too much SQL • Too much SQL LIKE instead of Elastic • Lack of proper SQL indexes • Too much unused code that was not removed • No CDN or proper HTTP Cache invalidation headers

64. • SQL N+1 Queries • Too much SQL • Too much SQL LIKE instead of Elastic • Lack of proper SQL indexes • Too much unused code that was not removed • No CDN or proper HTTP Cache invalidation headers • Too much synchronous work that should be async jobs

65. No Metrics No Optimization

66. - Alan Kay

67. “Make it Work - Alan Kay

68. “Make it Work Make it Correct - Alan Kay

69. “Make it Work Make it Correct Make it Fast - Alan Kay

70. “Make it Work Make it Correct Make it Fast Make it Cheap” - Alan Kay

71. You != Unicorn (nor Facebook, Google, Amazon, etc)

72. “Casa de Ferreiro, Espeto de FERRO!”

73. • Increase Revenue > Lower Costs

74. • Increase Revenue > Lower Costs • SaaS > PaaS > IaaS > In-House

75. • Increase Revenue > Lower Costs • SaaS > PaaS > IaaS > In-House • Maintainability > Performance

76. • Increase Revenue > Lower Costs • SaaS > PaaS > IaaS > In-House • Maintainability > Performance • PRIORITIES!!

77. • Increase Revenue > Lower Costs • SaaS > PaaS > IaaS > In-House • Maintainability > Performance • PRIORITIES!! • No Metrics, No Optimization

78. • Increase Revenue > Lower Costs • SaaS > PaaS > IaaS > In-House • Maintainability > Performance • PRIORITIES!! • No Metrics, No Optimization • You != Unicorn

79. PREMATURE OPTIMIZATION is the Root of all Evil

80. THANKS! www.codeminer42.com @akitaonrails

Conexão Kinghost - Otimização Prematura

Fabio Akita

Conexão Kinghost - Otimização Prematura