React Performance Optimization: Code Splitting

Webpack Bundle Analyzer is a tool that helps visualize the size of your webpack output bundles with an interactive zoomable treemap. It allows you to see exactly what's inside your bundles, which modules take up the most space, and identify large dependencies that could be candidates for code splitting. This visualization makes it much easier to spot opportunities for optimization and to verify that your code splitting strategy is working as expected by showing you the resulting chunk sizes.