Are CDN React builds slower than production builds?
Yes. CDN scripts used in tutorials are development builds with warnings and debugging code. They are larger and slower than minified production builds created by a bundler.
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More FAQs in Why the CDN Approach Is Only for Learning, Not Production
CDN scripts are large development builds with no minification, tree-shaking, or module system. Production needs small optimized builds, dependency management, and code splitting, all of which require a bundler.
A bundler minifies code, tree-shakes unused parts, splits code into chunks, handles environment variables, and produces optimized production builds. A CDN gives you the library as a single unoptimized script.
They use a bundler like Vite, Parcel, or Webpack, install React as an npm dependency, and ship optimized build artifacts to hosting platforms like Vercel, Netlify, or a custom server.
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