android-performance

name	Android Performance
description	Standards for Baseline Profiles, Startup Time, and UI Rendering
metadata	{"labels":["android","performance","baseline-profile","startup"],"triggers":{"files":["**/*Benchmark.kt","**/*Initializer.kt"],"keywords":["BaselineProfile","JankStats","recomposition"]}}

Android Performance Standards

Priority: P1

Implementation Guidelines

Startup Time

• Baseline Profiles: Mandatory for all production apps to pre-compile critical paths (improves startup by 30-40%).
• Lazy Initialization: Defer heavy SDK init using App Startup or lazy Singletons. Avoid blocking Application.onCreate.

UI Performance

• Recomposition: Use "Layout Inspector" to find unnecessary recompositions.
• Images: Use Coil/Glide with proper caching and resizing (.crossfade()).
• Lists: LazyColumn must use key and stableitem classes.

Anti-Patterns

• Nested Weights: **Avoid Nested Weights**: Use ConstraintLayout (Views) or simple Row/Col (Compose).
• Memory Leaks: **Watch Context**: Avoid leaking Activity Context in Singletons.

References

• Baseline & Startup