If your react state contains large lists, I think React's render() is going to be the bottleneck, not javascript arrays. That's why react state needs to be stru

If your react state contains large lists, I think React's render() is going to be the bottleneck, not javascript arrays. That's why react state needs to be structured in a tree, so you can implement shouldComponentUpdate and get O(log n) renders. I wrote more in reply to jlongster.