In the Blink of an Eye
summary
Claims that tiny delays matter: 100 milliseconds separates “instant” from lost revenue (Walmart ~1% uplift, Zalando ~7%), humans process images in ~13 milliseconds, and expectations tighten as devices improve. Concrete browser fixes actually used: fetchpriority, native lazy loading, speculation rules (small JSON blob) and view transitions — each is a few bytes or attributes that reduce hundreds of milliseconds. Anecdotes and metrics show these approaches get built, deployed, and noticeably improve perceived speed.
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chapters (15)
- 0:00Introduction
- 1:46Blinking exercise threshold
- 2:28Business impact of 100ms
- 3:32Perception thresholds
- 4:55Changing tech expectations
- 5:56Jevons paradox explained
- 7:23Responsive design limits
- 8:26User expectations growth
- 10:12Generational web expectations
- 13:03Performance scenarios
- 14:30Core Web Vitals
- 16:39Collaboration and innovation
- 17:00Modern browser features
- 19:10Betting on the browser
- 19:50Ruthless obsession for user experience
