performance

Android Performance Audit

Produce a structured audit report with prioritized findings and concrete fixes.

Audit Process

Phase 1: Triage

Scan project structure (build.gradle, AndroidManifest.xml, source tree) to determine which categories apply. SKIP categories with no relevant code.

Category	Skip If
Startup	No custom Application class, no splash screen
Recomposition	No Jetpack Compose (@Composable not found)
Memory	No ViewModel / Repository / singleton patterns
ANR	No SharedPreferences / BroadcastReceiver / sync I/O
Pagination	No list screens or large data sets
Baseline Profiles	NEVER skip — always relevant
Battery & Network	No background work, location, or network calls

Phase 2: Parallel Scan

Run all relevant categories in PARALLEL using independent Task agents. Each agent:

1. Grep for the category's anti-patterns (see search guide below)
2. Read matched files to confirm the finding is real
3. Return findings in the per-finding format below

Phase 3: Report

Merge parallel results into the final report format below.

Thresholds

Metric	Target	Critical
Cold start	< 500ms	> 1000ms
Warm start	< 300ms	> 600ms
Hot start	< 100ms	> 200ms
ANR rate	< 0.47%	> 1%
Crash rate	< 1.09%	> 2%

Anti-Pattern Search Guide

Grep-ready patterns per category. Only search categories that passed triage.

Startup

• class \w+ : Application → check onCreate body for heavy sync init
• ContentProvider in manifest → auto-init SDKs blocking startup
• Missing reportFullyDrawn() anywhere in codebase

Recomposition

• List< / MutableList< / ArrayList< in @Composable fun parameters → unstable type, use ImmutableList or @Immutable wrapper
• { viewModel. or { \w+ViewModel. inline in Composable call sites → lambda recreated every recomposition, extract with remember
• items( without key = in LazyColumn/LazyRow
• .value read outside graphicsLayer / Modifier.layout / Modifier.drawBehind → state read triggers full recomposition instead of layout/draw only
• Missing composeCompiler { reportsDestination } in build.gradle → no compiler metrics