React doesn't really have much of a public API surface. In Rx you can give up some operators but React doesn't have a similar concept. That said we will contin

React doesn't really have much of a public API surface. In Rx you can give up some operators but React doesn't have a similar concept. That said we will continue exploring how to drop some weight from React further down the road. This is not a priority right now because some large changes are coming relatively soon to React (work on incremental reconciler) so it would be unwise to focus on size optimization before a big refactoring. I think that we will be in better position to consider what can be removed or separated after we ship the incremental reconciler. Hopefully this will happen within a year. For now I don't have a good answer to this but I'll try to at least provide a summary of how large different pieces are when creating a high level technical overview of React next month.