Sandbox demo
Lists and Performance
FlashList vs FlatList. Avoiding the dropped-frame trap on long scrolls.
FlatList is fine for short lists. For anything past ~50 items, switch to Shopify's FlashList — it recycles cells instead of destroying them. v2 was rebuilt for React Native's New Architecture and dropped the old estimatedItemSize ritual: no size guesses, precise layout, smoother momentum scrolling. It's a near drop-in replacement for FlatList.
Sandbox transcript
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The transcript is canned — no real API calls. The point is to internalize the loop: user → plan → tool → result → answer.
Check your understanding
Q1. What changed in FlashList v2 that makes migration easier?
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