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
Economy of line With a composition as disciplined as this, everywhere you point the lens feels like a natural frame. The visible architecture comprises simply three walls, two benches, and the top of a flight of steps. It is a perfect expression of economy of line, with the dark green backdrop of the trees acting as a foil for the light grey concrete and granite. John Pawson, A Visual Inventory Stands up and hums