Performance pass: timeline, media, and Compose hot paths #85

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opened 2026-07-11 21:43:34 +00:00 by starsetbyte · 0 comments

starsetbyte commented

2026-07-11 21:43:34 +00:00

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Goal

Run a focused performance pass across the timeline and media surfaces, consolidating the existing performance plans instead of starting from unmeasured cleanup.

Scope

Recomposition and layout work during steady scrolling.
Image decode/cache and graphics-layer hotspots.
Paging/Room mapping and unnecessary list churn.
Baseline profile and macrobenchmark feasibility.

Acceptance criteria

Capture a before/after baseline on a named device/emulator with repeatable scenarios.
Use profiler or Macrobenchmark evidence to identify the highest-impact changes.
Fix only measured regressions/hotspots, with no broad behavior changes hidden in the pass.
Add or update performance regression coverage where practical and record remaining device-only work.

## Goal Run a focused performance pass across the timeline and media surfaces, consolidating the existing performance plans instead of starting from unmeasured cleanup. ## Scope - Recomposition and layout work during steady scrolling. - Image decode/cache and graphics-layer hotspots. - Paging/Room mapping and unnecessary list churn. - Baseline profile and macrobenchmark feasibility. ## Acceptance criteria - Capture a before/after baseline on a named device/emulator with repeatable scenarios. - Use profiler or Macrobenchmark evidence to identify the highest-impact changes. - Fix only measured regressions/hotspots, with no broad behavior changes hidden in the pass. - Add or update performance regression coverage where practical and record remaining device-only work.

starsetbyte added the

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performance

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2026-07-11 21:43:34 +00:00

starsetbyte referenced this issue from a commit

2026-07-12 01:49:56 +00:00

perf: add @Immutable to Compose-bound model types (#85)

starsetbyte referenced this issue from a commit

2026-07-12 02:59:19 +00:00

docs: July 11 handoff — full day summary