Website Response Times An Article by Jakob Nielsen www.nngroup.com Users really care about speed in interaction design...A snappy user experience beats a glamorous one, for the simple reason that people engage more with a site when they can move freely and focus on the content instead of on their endless wait. 0.1 seconds gives the feeling of instantaneous response. This level of responsiveness is essential to support the feeling of direct manipulation. 1 second keeps the user's flow of thought seamless. 10 seconds keeps the user's attention. A 10-second delay will often make users leave a site immediately. uxperformanceinteraction
The informing idea of functionalism The informing idea of functionalism is what is called elegance by engineers and scientists—the notion that the best solution to a problem (whether applied to a mathematical proof, a machine, or an organizational diagram) is the most succinct. This conceit collapses the technical, the ethical, and the aesthetic, which powers the idea exponentially. Michael Sorkin, 20 Minutes in Manhattan The Nature and Aesthetics of Design functionaesthetics