Defer Heavy Work with InteractionManager for Smoother UI

Insight

When a screen transition or a gesture animation runs, any synchronous JavaScript work can compete for the JS thread, causing jank. InteractionManager.runAfterInteractions lets you postpone heavy calculations, data parsing, or state updates until the current interaction queue is empty, ensuring the UI thread stays free for rendering.

Example

import { useEffect } from 'react';
import { InteractionManager, View, Text } from 'react-native';

export default function ProfileScreen() {
  useEffect(() => {
    const task = InteractionManager.runAfterInteractions(() => {
      // Expensive JSON parsing that would otherwise block UI
      const bigData = JSON.parse(largePayload);
      // Update state or cache here
    });
    return () => task.cancel();
  }, []);

  return (
    <View>
      <Text>Loading profile…</Text>
    </View>
  );
}

Takeaway

Wrap non‑essential, CPU‑heavy work in InteractionManager.runAfterInteractions (or its promise‑based variant) to keep animations fluid. Remember to cancel the task on unmount to avoid memory leaks.