Echo JS 0.11.0

what is the purpose of virtual DOM if not to speed up DOM manipulation ?

The virtual DOM is an implementation detail needed for performing render on every state change. The main feature of React is re-rendering everything when the state changes. Which would be impossible without a virtual DOM.

You don't need a virtual DOM to re-render everything when state changes. We did not wait for React nor Angular to write change detection algorithms. Virtual DOM is one of the techniques of data-binding, and presumed the best performing. A few milliseconds saved at rendering, tenths of a second lost at initial loading. Is it really worth it ?