Optimizing Three.js Performance on Mobile Devices

Based on your description of performance issues on mid-to-low-end mobile devices, I can suggest several optimization strategies that might help reduce overheating and improve performance.

Key Performance Bottlenecks

Your setup includes several potentially expensive operations:

1. Post-processing (Bloom effect)
2. RectAreaLight (computationally expensive)
3. MeshStandardMaterial (more expensive than basic materials)
4. Continuous animation via useFrame
5. GSAP animations

Optimization Strategies

1. Renderer and Post-Processing Optimizations

• Reduce resolution on mobile devices:

  JAVASCRIPTCopied
  // In your Canvas component or where you set up the renderer
  const dpr = isMobile ? [0.5, 1] : [1, 2]; // Lower pixel ratio for mobile
  return <Canvas dpr={dpr} {...otherProps}>

• Simplify or disable Bloom on mobile:

  JAVASCRIPTCopied
  const isMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);
  
  return (
    <EffectComposer enabled={!isMobile}>
      <Bloom luminanceThreshold={0.2} intensity={isMobile ? 0.5 : 1.5} />
    </EffectComposer>
  );

2. Model and Material Optimizations

• Use simpler materials for mobile:

  JAVASCRIPTCopied
  const Material = isMobile ? MeshLambertMaterial : MeshStandardMaterial;
  return <Material {...props} />;

• Reduce polygon count for mobile:
  Consider creating a lower-poly version of your turbine model for mobile devices.

3. Lighting Optimizations

• Simplify lighting for mobile:

  JAVASCRIPTCopied
  {!isMobile && <RectAreaLight {...props} />}
  <directionalLight intensity={isMobile ? 0.8 : 1} />

4. Animation Optimizations

• Reduce animation frame rate on mobile:

  JAVASCRIPTCopied
  useFrame((state, delta) => {
    if (isMobile && state.clock.elapsedTime % 0.03 > 0.015) return; // Skip frames
    // Your animation code
  });

• Optimize GSAP animations:

  JAVASCRIPTCopied
  gsap.to(target, {
    duration: isMobile ? 1.5 : 1,
    ease: "power2.out",
    // Other properties
  });

5. Utilize Three.js Addons for Optimization

Based on the available Three.js addons, consider using:

• BufferGeometryUtils for geometry optimization:

  JAVASCRIPTCopied
  import { mergeBufferGeometries } from 'three/examples/jsm/utils/BufferGeometryUtils.js';
  // Merge static geometries to reduce draw calls

6. Performance Monitoring

• Add a Stats component to monitor performance:

  JAVASCRIPTCopied
  import { Stats } from '@react-three/drei';
  
  // In your component
  return (
    <>
      <Stats />
      {/* Your scene */}
    </>
  );

Device-Specific Rendering

Consider implementing a more comprehensive device detection system to apply different levels of quality:

JAVASCRIPTCopied
const getDeviceTier = () => {
  // Simple detection based on user agent and device memory
  const memory = navigator.deviceMemory || 4;
  const isMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);
  
  if (isMobile && memory <= 2) return 'low';
  if (isMobile) return 'medium';
  return 'high';
};

// Then use this in your component
const deviceTier = getDeviceTier();

This approach would allow you to apply different optimizations based on the detected device capabilities.

Remember that mobile devices, even high-end ones like the iPhone 14 Pro Max, have thermal limitations that can cause throttling during extended 3D rendering sessions. Implementing these optimizations should help reduce the load and improve the user experience on these devices.