Article describing how switching from Sprockets to Webpack can make your page load faster

[Rodrigo Rosenfeld Rosas]

This is actually a series of 3 articles explaining how to get the best load time for an SPA and why Sprockets will not allow you to get the last required bits. More specifically, it doesn't support code splitting (lazy code loading) out of the box and it's not easy to implement that. But webpack does:

http://rosenfeld.herokuapp.com/en/articles/2016-02-26-improving-spa-loading-time-with-webpack-and-why-sprockets-is-in-your-way