Steve Souders – stevesouders.com – has worked at Yahoo and now Google and has written two O’Reilly books and a number of tools and websites on Web Performance Optimization. The most popular is YSlow – developer.yahoo.com – a browser plugin to analyze page loading performance. He came to Dropbox Headquarters on September 29th, 2011 to talk to the Dropboxers and their guests about High-Performance HTML5. Slides available at stevesouders.com (pptx) and db.tt (viewer).