I've built an entire SPA based on React (and Backbone), which I guess can be considered semi-large. Performance was not an issue throughout the project, even w

I've built an entire SPA based on React (and Backbone), which I guess can be considered semi-large. Performance was not an issue throughout the project, even with complex components like data grids. The rendering is negligible next to things like acquiring data from the backend, that's where most of the optimization went (caching, loading resources upfront, etc). React just makes it a no-brainer.