Real World HTTP/2

on YouTube ↗30m

" summary

99designs moves to HTTP/2 and measures with Calibre dashboards and WebPageTest; metrics are content DOMContentLoaded, first paint and speed index. Typical latency‑bound pages show ~5% faster speed index and more complete initial paints, but image‑heavy, bandwidth‑bound galleries (80 images, several MBs) show 5–10% slower visual completion despite faster total load. Conclusion: HTTP/2 improves many pages but can regress large media pages unless server/browser resource prioritization and CDN behavior are explicitly tested and tuned.

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" chapters (28)

1. 0:00Intro
2. 0:46HTTP V1.0 (1996) HTTP/1.1 (1997) HTTP/1.1 UPDATED (1999)
3. 1:40HYPERTEXT
4. 2:33THE HYPE
5. 2:5399designs
6. 3:18WHAT I WILL
7. 6:21HEAD OF LINE BLOCKING
8. 7:11CONGESTION CONTROL
9. 10:26CONCATENATION SPRITING INLINING
10. 12:08FREE PERFORMANCE
11. 14:17Calibre
12. 16:00HIGH LATENCY TESTING
13. 16:42TL:DR
14. 17:42NETWORK SATURATION
15. 18:26LOADING PRIORITY
16. 20:06RESOURCE PRIORITY
17. 20:59THE STREAM
18. 22:24THE HTTP/2 FINE PRINT
19. 22:39IT'S NOT JUST THE NUMBER OF BYTES. OR REQUESTS PER SECOND. BUT THE ORDER IN WHICH BYTES ARE DELIVERED. TEST YOUR HTTP/2 SERVER VERY CAREFULLY - ILYA GRIGORIK
20. 23:26YOU KNOW WHAT'S BEST FOR YOUR SITE
21. 24:27THIS POWER SHIFT IS A DOUBLE-EDGED SWORD. - GUESS WHO
22. 24:47HTTP/2 STREAM WEIGHTS
23. 25:24HTTP/2 STREAM DEPENDENCIES
24. 25:53TAKE AWAYS
25. 26:03TRADEOFFS AND NUANCE
26. 26:47RESOURCE WEIGHTING PRIORITIZATION RESOURCE DEPENDENCY PRIORITIZATION
27. 27:56TOOLS
28. 28:45HIGH PERFORMANCE BROWSER NETWORKING - ILYA GRIGORIK

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