[vjeux]

If you use `shouldComponentUpdate`, then React outperforms Blaze on the circle benchmark for both single and large number of updates. See Andrey Popp JSFiddles: https://groups.google.com/forum/#!topic/meteor-core/-px_AGhj...

React by default is fairly fast but what makes it stand out is that it gives the tools to make the bottlenecks faster without having to drop the nice abstraction.

[masklinn]

Popp's fiddles don't use shouldComponentUpdate, as far as I can tell. They replace using props (application state) by components-local state and an animation prop. I'm not entirely certain that his semantics map to the original ones (in terms of expectations).

[vjeux]

My bad :x JSFiddle is unusable on mobile and I assumed it was using shouldComponentUpdate. Anyway, the conclusion still holds, you can refactor your code to be performant while keeping in the React paradigm.

You have a lot less control over the performance of your app with data binding.