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Hi,

as a Create React App maintainer I'd love if you could share some scenarios where CRA itself would cause performance issues. CRA itself is mostly just developer tooling and every other feature is opt-in. The team and many contributors (including people on WebPack team) have spent quite a lot of time on optimizing the production builds CRA produces; building an React only app won't have much else than React and React-DOM itself, while we also automatically do more advanced things like bundle spitting too.

Create React app includes almost no extra client facing code other than react. There is an issue with how you made the application.

That's like saying VSCode makes your site slower.