Real world connectivity: Beyond the bubble
summary
Global connectivity stats are concrete: 43% of people have internet, India added ~100 million new users in 2016, the global average download speed is ~7.2 MB/s and ~60% of users sit on 2G. Empirically useful tactics include using preload for fonts, font-display: swap and WOFF2 to avoid 3–5s render delays that affect ~68% of sites, measuring with Chrome DevTools CPU throttling and Lighthouse, code-splitting via webpack dynamic imports, and testing on a Moto G4. Calibre and audits are used to monitor pausing/compile time and Time To Interactive.
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chapters (12)
- 0:00Intro
- 3:27Real world connectivity
- 5:58Cheap data
- 7:36LTE
- 9:04Moto G4
- 11:50The critical request
- 13:46Fonts
- 16:07Fold
- 22:55Average script size
- 29:06Metrics
- 30:21Lighthouse
- 33:10Performance
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