Revitalising the Web - The Importance of Web Performance
summary
HTTP Archive shows average page weight rising from ~650 KB a decade ago to many megabytes today with ~73 requests and 21 JS files; one sample site serves three videos on mobile averaging 1.5 MB each. Use field tools (Chrome UX Report, PageSpeed Insights) and lab tools (Lighthouse, DevTools, WebPageTest). Core Web Vitals and thresholds matter: LCP ≤2.5s good, 2.5–4s needs work, >4s poor; CLS ≤0.1 good, >0.25 poor. Image optimization example: Cloudinary auto=format,quality cuts 583KB → 32KB.
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chapters (9)
- 0:00Web growth and performance
- 5:16Impact of slow websites
- 7:47Field vs lab tools
- 13:23Core Web Vitals explained
- 19:06Modern JavaScript considerations
- 20:35Demo on cumulative layout shift
- 23:44Lighthouse report walkthrough
- 25:30Chrome DevTools performance tab
- 27:56Resources and closing
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