Performance Profiler (Android)

Checklist

Recompositions

• Composables only recompose when state changes
• State properly scoped with remember
• Stable item keys in LazyColumn

Lists

• Use LazyColumn not Column + verticalScroll for large data
• Stable keys via key() parameter
• Lightweight item composables

Memory

• No memory leaks (avoid Activity/View refs)
• Use Coil/Glide for image loading with caching
• Proper lifecycle management

Body Computation

• No heavy work in composable body
• Use remember for expensive calculations
• Use derivedStateOf for derived state

Quick Wins

Debug

Use Layout Inspector → Recomposition Counts to visualize recompositions

Severity

• 🔴 Critical: Visible lag, leaks
• 🟡 Moderate: Noticeable impact
• 🟢 Minor: Optimization opportunity