name: android-performance-best-practices description: Android performance best practices — startup, memory, battery, app size, Baseline Profiles. user-invocable: true

Android Performance Best Practices

Cross-cutting skill — always activates alongside the project-type-specific skill.

Hard Rules

• •TTID (Time To Initial Display) < 2 seconds.
• •TTFD (Time To Full Display) < 4 seconds.
• •No heavy initialization on the main thread during Application.onCreate() or Activity.onCreate().
• •Use App Startup library instead of ContentProvider-based init.
• •Generate and ship Baseline Profiles for critical user journeys.
• •No static references to Activity or Context — causes memory leaks.
• •Enable StrictMode in debug builds.
• •Enable R8 + shrinkResources for release builds.
• •Use WebP for raster assets, vector drawables where possible.
• •Batch network requests to respect Doze mode.

Core Patterns

• •Call reportFullyDrawn() when content is ready.
• •Defer non-critical init with lazy or background threads.
• •Use Macrobenchmark for startup and scroll performance measurement.
• •Monitor memory with LeakCanary in debug builds.
• •Use Android Vitals / Firebase Performance for production monitoring.
• •Prefer WindowInsets over deprecated system UI flags.

References

• •references/app_startup.md
• •references/baseline_profiles.md
• •references/memory_management.md
• •references/battery_optimization.md
• •references/strict_mode.md
• •references/app_size.md
• •references/compose_performance.md
• •references/tracing.md