The 12MB Web Page: A tale of perfect PageSpeed scores & developer happiness

Transcript

1. The 12MB Web Page A tale of perfect PageSpeed scores

   & developer happiness
2. None
3. None
4. None

5. A static HTML page + some photos Fast? Easy to

   build? Free?

6. Fast?

7. https://eev.ee/blog/2016/03/06/maybe-we-could-tone-down-the-javascript/

8. http://idlewords.com/talks/website_obesity.htm

9. Web pages are pretty fast by default! They only get

   slow when we add “clever” cruft

10. on the other hand…

11. Photos are biiiiiiiiiig!

12. The challenge: Can I make a blazing fast, image- heavy

    web page without resorting to lots of hacks & workarounds

13. How fast can a simple HTML document be?

14. None
15. None
16. None
17. None
18. None

19. Speed Index: 1613 In the fastest ~10% of all websites

20. Optimisation #1 A truthful browser spinner

21. https://medium.com/@kellycatchpole/10-best-dog-breeds-for-your- family-22ea2cdde78d Browser says page has finished loading LIES!!!!

22. Don’t make the browser spinner lie. When the page says

    it’s done loading, it’s really done!

23. Optimisation #2 Progressive JPEG

24. None

25. Optimisation #3 Responsive Images

26. Widescreen + Retina: 11.1MB Tablet + Retina: 9.8MB Phone +

    Retina: 8.7MB Widescreen: 7.8MB Tablet: 6.5MB Phone: 1.7MB

27. Optimisation #4 Font Face Observer

28. None

29. https://github.com/bramstein/fontfaceobserver

30. None

31. Optimisation #5 <script async src=“…”>

32. Optimisation #6 Cache everything forever

33. None

34. Optimisation #7 Use a CDN

35. None

36. Notable absentees: • “Critical CSS” • Loading content asynchronously •

    Anything very tricky or hacky at all…

37. Easy to build?

38. I couuuld hand-write the HTML & CSS for this, but

    I want…

39. • A living styleguide! • Sass! • Hot reloading! •

    Reusable components!

40. The tooling: • React (no client side!) • Webpack +

    static-site-generator-webpack-plugin • Sass • CSS Modules

41. React is a better back-end templating language than your favourite

    back-end templating language.
42. None
43. None

44. Free?

45. GitHub Pages + CloudFlare =

46. GitHub Pages has pretty crappy caching settings…

47. None

48. But if you stick CloudFlare in front of it…

49. Easy cache header setting!

50. Free SSL! (well, “flexible SSL”)

51. A static HTML page + some photos Fast Easy to

    build Free ✅ ✅ ✅