Flat as a pancake

on YouTube ↗34m

" summary

Three implementations of a RecyclerView‑style item measure actual costs: a flat RelativeLayout baseline, swapping ImageViews for Drawables to remove per-view display lists, and finally drawing text with TextLayout wrapped as a drawable. Measurements use Android C traces and show a 13% win from drawables and a 26% win when moving text into TextLayout, plus a further 10x first‑draw speedup when prepopulating glyph caches. The talk also shows regressions: ripple invalidation forces whole‑view redraws and breaks accessibility and touch conveniences.

AI-written summary · about

" chapters (7)

1. 0:00Start
2. 1:35Drawing process
3. 6:01Performance analysis
4. 8:56Drawables
5. 14:20Drawing text
6. 28:20Accessibility
7. 30:29Touch events

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