Best Practice for Text on Android and Its Internals

on YouTube ↗43m

" summary

Shows how to speed up Android text rendering by identifying TextView hotspots with systrace and by turning off hyphenation to cut layout cost roughly in half. Describes moving expensive TextView measure/layout off the UI thread using PrecomputedText(Compat) and the getTextFuture / setTextFuture helpers, and explains caching strategy (LRU sizes) while warning about a known framework crash and a single large lock contention on older Android versions.

AI-written summary · about

" chapters (14)

1. 0:00Introduction
2. 3:04Text rendering slowness
3. 9:54TextView layout internals
4. 17:13Text layout caching
5. 21:50Precompute layout with threads
6. 26:15Prefetch and background layout
7. 33:07Android 9/10 font features
8. 37:11Font collection and variable fonts
9. 38:58Locale-aware font selection
10. 39:51System serif font install
11. 40:35Parallel text layout Android 10
12. 41:17CJK justification support
13. 42:02Tall script line spacing
14. 43:04Q&A

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