awesome-mobile-performance-agent-skills

Schedule, batch, and constrain background work with WorkManager, BGTaskScheduler, and push-over-poll patterns to minimize battery and data cost.

Attribute battery drain to CPU, radio, GPS, display, and background work using Android Battery Historian and Xcode Energy Log / Instruments Energy gauge.

Shrink APK/AAB and IPA size with R8/ProGuard, dead-code elimination, asset hygiene, and Android App Bundle / App Thinning best practices.

Cut local and CI build times on Android (Gradle config cache, build cache, KSP over KAPT) and iOS (Xcode build cache, ccache, modules). Use when clean builds exceed ten minutes.

Downsample, cache, and choose the right image format (AVIF, HEIC, WebP) to cut memory, network, and decode time on iOS and Android.

Find and fix common memory leaks caused by listeners, closures, singletons, and lifecycle mismatches on iOS, Android, Flutter, and React Native.

Capture and analyze heap dumps on Android (Android Studio Profiler, LeakCanary) and iOS (Instruments Allocations/Leaks). Use when memory-related crashes or growth are suspected.

Deliver responsive images via CDN with AVIF/WebP, placeholders, and progressive loading on iOS, Android, Flutter, and React Native.

Cut mobile network cost with HTTP/2, HTTP/3 (QUIC), Brotli/Zstd compression, and payload trimming. Use when p95 latency or bytes-per-screen exceeds budget.

Layer caches (memory, disk, CDN), use ETag and stale-while-revalidate, and batch small requests to cut latency and radio cost.

Apply read-through, write-through, TTL, LRU, and encrypted caches correctly across memory, disk, and secure storage on mobile.

List virtualization and pagination patterns per platform — RecyclerView/Paging 3, Compose LazyColumn, SwiftUI List, Flutter ListView.builder, RN FlashList.

Hit 60/90/120Hz frame rate budgets by balancing CPU (UI thread) and GPU (RenderThread/Metal) work. Use when frame time exceeds the device refresh budget.

Detect and attribute janky frames using Perfetto, Android Choreographer logs, Xcode Time Profiler, and Flutter DevTools. Use when users report stutters even though "everything looks fine" in dev.

Reduce overdraw, layout depth, and unnecessary recomposition/re-render in native Android, iOS, Compose, SwiftUI, Flutter, and React Native UIs.

Reduce cold start time (TTID and TTFD) on iOS and Android using baseline profiles, main-thread hygiene, and selective pre-warming. Use when launch latency exceeds the budget in Agent.md.

Profile cold, warm, and hot start with Android Macrobenchmark, Xcode Instruments App Launch template, and Flutter DevTools. Use when you need to attribute startup time to specific phases.

Optimize warm start (process alive, activity recreated) and hot start (app resumed to foreground) on iOS and Android. Covers process restoration, lazy singletons, and saved state.

Use Flutter DevTools Performance, CPU, Memory, and Network views to find UI-thread and raster-thread bottlenecks.

Catalog of Xcode Instruments templates, Android Studio Profiler modules, and Perfetto — what to pick for CPU, memory, GPU, network, energy, and startup work.

Profile React Native with Hermes sampler, Flipper, and the New Architecture profiler. Use when JS thread, bridge, or layout commits are causing jank.