# Android Performance

> Optimize Android app startup, UI rendering, frame stability, and benchmark performance with Baseline Profiles, Macrobenchmark, and lazy initialization. Use when reducing startup time, diagnosing jank, or measuring rendering; defer Compose state API and test-only questions.

- Skill: `hoangnguyen0403/android-performance` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add hoangnguyen0403/android-performance`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hoangnguyen0403/android-performance/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: HoangNguyen0403 (https://skillmd.com/u/hoangnguyen0403)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/hoangnguyen0403/android-performance

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# Android Performance Standards

## **Priority: P1 (HIGH)**

## 1. Accelerate Startup

- Generate **Baseline Profiles** for all production apps — pre-compiles critical paths (30-40% startup improvement).
- Defer heavy SDK init using `App Startup` or lazy Singletons. Never block `Application.onCreate`.

See [baseline & startup](references/implementation.md) for lazy initialization patterns.

## 2. Eliminate UI Jank

- Use Layout Inspector to find unnecessary recompositions.
- Load images with Coil/Glide using proper caching and resizing (`.crossfade()`).
- `LazyColumn` must use `key` and stable item classes.

See [baseline & startup](references/implementation.md) for LazyColumn optimization.

## 3. Avoid Layout Bottlenecks

- Replace nested weights with `ConstraintLayout` (Views) or `Row`/`Column` with `Modifier.weight` (Compose).
- Never hold Activity context in Singletons — use Application context to prevent memory leaks.

## Anti-Patterns

- **No Nested Weights**: Use ConstraintLayout (Views) or Row/Column (Compose) instead.
- **No Activity Context in Singletons**: Use Application context to prevent memory leaks.

## References

- [Baseline & Startup](references/implementation.md)


## Canonical response anchors

- Additional task-grounded exact anchors: Baseline Profile