In this talk I will cover the UI performance and how important it is for any website.
I will cover most (if not all) the ways to optimize the system, starting from content delivery and resource preparation, to front-end application tweaks that could affect performance.

How all of this works in native Drupal 8, as well as some specifics in this in relation to decoupled websites having a React as a client side UI framework.

It will also include some sample case studies on projects we had and the decisions we've taken to accommodate the requirements and performance needs of those systems.