Defer Heavy Tasks with InteractionManager for Smoother UI

Insight

When a screen mounts, you might be tempted to fetch data or run heavy calculations immediately. In React Native, doing so while a transition or animation is still in progress can cause frame drops and a janky feel. InteractionManager.runAfterInteractions lets you schedule work to execute after all ongoing interactions have finished, giving the UI a chance to settle before the CPU is taxed.

Example

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

export default function ProfileScreen() {
  useEffect(() => {
    const task = InteractionManager.runAfterInteractions(() => {
      // Expensive work like parsing a large JSON payload
      const heavyResult = computeExpensiveData();
      console.log('Result ready', heavyResult);
    });
    return () => task.cancel(); // cleanup on unmount
  }, []);

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

Takeaway

Wrap non‑UI‑critical, CPU‑heavy logic in InteractionManager.runAfterInteractions. This simple pattern keeps animations buttery smooth and improves perceived performance without adding extra libraries.