The only performance problems I've seen were created by people who don't understand when React triggers a redraw, thus rerendering a 1MB image on every keyboard keystroke.
As long of you are a bit mindeful of the big pitfalls (any bigger framework has some of those), the performance of React-Native is excellent.
As long of you are a bit mindeful of the big pitfalls (any bigger framework has some of those), the performance of React-Native is excellent.