A lot of the heft of React comes from its optimization and reconciliation code. Looking at the examples on the homepage, I’m struggling to see how this framework would efficiently make updates. It seems like it would just need to update the entire component tree down on any update. For any sufficiently large app this becomes very slow very quickly.
VanJS is a lot faster than React: https://vanjs.org/#performance. UI re-rendering in VanJS is kept at the local level as much as possible, which can be achieved without even the need of vdom
