⚡ Bolt: Optimize FlatList memory and rendering performance#149
⚡ Bolt: Optimize FlatList memory and rendering performance#149TargetMisser wants to merge 1 commit intomainfrom
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Added windowing props (`initialNumToRender`, `maxToRenderPerBatch`, `windowSize`, `removeClippedSubviews`) to `FlatList` components in `FlightScreen`, `PasswordScreen`, and `CalendarScreen` to improve memory consumption and list scrolling performance. Co-authored-by: TargetMisser <52361977+TargetMisser@users.noreply.github.com>
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| initialNumToRender={15} | ||
| maxToRenderPerBatch={15} | ||
| windowSize={5} | ||
| removeClippedSubviews={true} |
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Setting removeClippedSubviews to true unconditionally here introduces a rendering regression risk on iOS, where FlatList can intermittently hide or drop row content when cells are recycled during scroll (especially with styled card rows like these). In this commit the other lists were guarded to Android only, but this one is forced on all platforms, so iOS users can experience disappearing password rows while scrolling.
Useful? React with 👍 / 👎.
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💡 What:
Added performance optimization windowing properties to
FlatListcomponents across the app (FlightScreen,PasswordScreen,CalendarScreen).🎯 Why:
By default, React Native's
FlatListrenders large blocks of off-screen items (windowSize={21}). This consumes excessive memory and CPU during rapid scrolling, particularly for complex lists. Restricting the rendering window and enabling unmounting of clipped subviews dramatically improves list responsiveness.📊 Impact:
🔬 Measurement:
Open
FlightScreenorPasswordScreenwith more than 20 entries. Scroll rapidly and observe the JS and UI framerate via React Native performance monitor; it should remain closer to 60fps with fewer GC stutters.(Logged learning to
.jules/bolt.md)PR created automatically by Jules for task 18233639252689303341 started by @TargetMisser