It's one of the ideas for shouldComponentUpdate that I wrote about here, but it's not described in a lot of detail: http://guscost.com/2015/05/27/react-js-and-

It's one of the ideas for shouldComponentUpdate that I wrote about here, but it's not described in a lot of detail: http://guscost.com/2015/05/27/react-js-and-flux-ideas-for-practical-applications/ http://guscost.com/2015/05/27/react-js-and-flux-ideas-for-pr... One of these days I'll put up another piece on Flux/React, and an example application to demonstrate an approach that doesn't have a lot of dependencies (not even ES6, for example). Also I have not run into any pitfalls using ImmutableJS yet apart from the extra overhead, so thanks for the heads up.