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 multiplicity of living patterns The more living patterns there are in a thing—a room, a building, or a town—the more it comes to life as an entirety, the more it glows, the more it has this self-maintaining fire, which is the quality without a name. Christopher Alexander, The Timeless Way of Building The right overlapEach element performs many functions complexity