HTTP Headers that Make Your Website Go Faster

on YouTube ↗38m

" summary

Shows how to use HTTP headers with Varnish Cache to cut origin load: claims 1.3 Tbps on one machine and 1.17 Gbps per watt as performance/efficiency proof points, recommends emitting ETags + conditional 304 and validating them early (pre-hook or Redis) to skip framework boot, explains s-maxage/age remaining, stale-while-revalidate and stale-if-error for async revalidation and outage tolerance, covers Vary, immutable, surrogate-control and Edge Side Includes (ESI) for composable edge rendering.

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" chapters (15)

1. 0:00Website speed matters
2. 2:28Caching fundamentals
3. 8:26Caching proxies protect servers
4. 10:11HTTP headers for caching
5. 11:35Key caching concepts
6. 13:40Cache-Control deep dive
7. 18:15Efficient revalidation
8. 22:29Stale content handling
9. 25:18Real-time updates with must-revalidate
10. 26:23Immutable content rules
11. 28:32No-cache vs no-store directives
12. 29:57Multilingual caching
13. 32:25Surrogate caching and edge
14. 33:50Edge Side Includes
15. 36:40Implementation beyond headers

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