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How to improve the performance of your website ...

Avatar for Thijs Feryn Thijs Feryn
December 08, 2015
Technology
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How to improve the performance of your website - FeWeb15

Web performance talk for FeWeb Congress edition 2015
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Thijs Feryn

December 08, 2015
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Transcript

  1. By Thijs Feryn How to improve the performance of your

    website

  2. Hi, I’m Thijs

  3. I’m @ThijsFeryn on Twitter

  4. I’m an Evangelist At

  5. I’m a at board member

  6. Web performance is an essential part of the user experience

  7. Infrastructure

  8. Code

  9. Browser rendering

  10. User location

  11. Down Slowdown ~ downtime

  12. Focus on the foundation first

  13. Fast servers

  14. Performance != Scalability

  15. Performance: speed

  16. Scalability: constant speed with increasing load

  17. Add servers to maintain performance

  18. Stability

  19. Code efficiently

  20. Identify slowest part

  21. Optimize database

  22. Optimize runtime

  23. After a while you hit the limits

  24. Don’t recompute if the data hasn’t changed

  25. Cache

  26. Memcached Redis APC

  27. None

  28. Optimize database Optimize runtime A void A void

  29. Don’t recompute if the data hasn’t changed

  30. Varnish

  31. Normally User Server

  32. With Varnish User Varnish Server

  33. Caching in your architecture

  34. Respect HTTP

  35. Cache-control: public, max- age=3600, s-maxage=7200 Cache-control: no-cache, no- store VS

  36. Cookies?

  37. Edge Side Includes

  38. None

  39. Don’t cache header

  40. Cache footer until 31/12/2015 23:59:59

  41. Cache for a day

  42. Cache for an hour

  43. <!DOCTYPE html> <html> <head> <title>The Demo</title> <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="/css/bootstrap.min.css"> <link rel="stylesheet" href="/css/bootstrap-theme.min.css"> <script src=“/js/jquery-2.1.4.min.js"></script> <script src="/js/bootstrap.min.js"></script> </head> <body> <nav class="navbar navbar-inverse navbar-fixed-top"> <esi:include src=“http://mysite.dev/nav" /> </nav> <div class="jumbotron"> <esi:include src="http://mysite.dev/jumbotron" /> </div> <div class="container"> {% block content %}{% endblock %} <hr> <footer> <esi:include src="http://mysite.dev/footer" /> </footer> </div> </body> </html> ESI tags

  44. Hit rate

  45. Browser rendering

  46. ✓Concurrency limitations ✓Slowband, bad mobile connection ✓First byte time ✓Rendering

    time ✓Limit resource size ✓Limit resource amount ✓Re-use TCP connections

  47. Compress images, JS & CSS

  48. Combine multiple JS & CSS into one file

  49. Right image size for the right device

  50. Non- blocking Javascript

  51. Google PageSpeed Insights & Web Page Performance Test

  52. User location

  53. Caching in the edge

  54. Content Delivery Network

  55. Faster responses per request

  56. Don’t saturate your own network

  57. None
  58. None
  59. None