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.

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

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

Memory

• context: or Context field in ViewModel / Repository / object declaration → Activity leak
• CoroutineScope( without lifecycle-aware cancellation
• companion object or top-level val holding Activity/View/Fragment reference
• Object creation (= Rect( / = Paint( / = StringBuilder() inside for / while loop body

ANR

• .commit() on SharedPreferences → blocks main thread, use .apply()
• Network/DB/File I/O call NOT wrapped in withContext(Dispatchers.IO) on a path reachable from main thread
• BroadcastReceiver subclass with onReceive body missing goAsync()

Pagination

• Column { followed by .forEach or for ( → composes ALL items, use LazyColumn
• Large data source without Paging 3 integration

Baseline Profiles

• profileinstaller NOT in dependencies (build.gradle / libs.versions.toml)
• No :baselineprofile module or BaselineProfileRule test class

Battery & Network

• AlarmManager usage → should be WorkManager for deferrable work
• OkHttpClient without .cache( → missing HTTP cache
• Continuous location or sensor listener without interval / removeUpdates

Output Format

Per Finding

[PERF-{CATEGORY}-{NNN}] impact: CRITICAL | HIGH | MEDIUM | LOW
  Finding: <root cause>
  Location: <file:line>        ← required for CRITICAL/HIGH only
  Fix: <concrete action>
  Metric: <expected improvement>

Final Report

## Performance Audit Report

### Summary
- Critical: N | High: N | Medium: N | Low: N
- Scanned: N/7 categories (skipped: <list with reasons>)

### Findings

#### Startup
[PERF-STARTUP-001] impact: CRITICAL
  Finding: Synchronous SDK init in Application.onCreate
  Location: App.kt:15
  Fix: Defer via App Startup library or lifecycle observer
  Metric: ~400ms cold start reduction

#### ...

### Metrics
| Metric | Estimated | Target | Status |
|--------|-----------|--------|--------|
| Cold start | Xms | <500ms | PASS/FAIL |
| ANR rate | X% | <0.47% | PASS/FAIL |