There are scores of concerns, both back-end and front-end, when considering performance. When it comes to accessibility, user performance is also a major concern and extends beyond things like perceived time. While perceived time is very important for UX, accessible user experience intersects performance in that it requires allowing the user to answer one core question as they work with the interface: "What is this thing, and what does it do". In this talk we'll talk about the intersections of UX, performance, and accessibility and how each contribute to an accessible user experience. More info at: https://fronteers.nl/congres/2016-spring/sessions/to-hell-with-performance-by-karl-groves