The issue with OpenCV.js in your React app is that it's a large file (13MB), and bundling it with Webpack causes extremely long compilation times. Instead of importing OpenCV.js directly into your source code, you should load it dynamically in the browser so Instead of bundling OpenCV.js in your React app, you can use a CDN (Content Delivery Network) to load it dynamically. This will significantly reduce build times and improve efficiency.