mobile-performance
App startup, memory management, battery efficiency, network optimization, and profiling tools
Profile →npx skills add cosmicstack-labs/mercury-agent-skills --skill mobile-performance --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Mobile Performance Profile, diagnose, and optimize mobile app performance. ## Key Metrics | Metric | Target | Tool | |--------|--------|------| | Cold Start | <1.5s | Xcode Organizer, Play Console | | Warm Start | <0.5s | Systrace, os_signpost | | Frames | 60fps (16ms) | Profile GPU, Perfetto | | APK/IPA Size | <50MB | size-report, analyzer | | Memory | <150MB | Xcode Memory Debugger, Memory Profiler | | Network Latency | <200ms p95 | Proxyman, Charles | ## Startup Optimization ### iOS - Reduce dynamic framework loading (prefer static libraries) - Lazy-load non-critical services - Profile with `Instruments - App Launch` - Use `dispatch_once` for singletons ### Android - Apply `App Startup` library for content providers - Profile with `Android Studio - Startup Profiler` - Use baseline profiles (Android 12+) - Defer heavy init to background threads ## Memory Management - Watch for retain cycles (weak/unowned references) - Image caching: use NSCache/LruCache with size limits - Monitor for OOMs in production with crash reporting - Release view controllers when off-screen ## Network Optimization - HTTP/2 multiplexing for concurrent requests - Response caching with ETags - Prefetch dat
- Key Metrics
- Startup Optimization
- iOS
- Android
- Memory Management
- Network Optimization
What does the mobile-performance skill do?
App startup, memory management, battery efficiency, network optimization, and profiling tools
How do I install it?
Run `npx skills add cosmicstack-labs/mercury-agent-skills --skill mobile-performance --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From cosmicstack-labs/mercury-agent-skills, a repository with 364 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.