Blog Archive » Updated ‘Elastic Racetrack’ for Flash 9 and AVM2. In 2005 Ted Patrick posted a great article on the frame execution model inside the Flash Player that he dubbed the ‘elastic racetrack‘. It’s served as a great reference for me over the years to help understand how code execution and rendering were balanced within the processing of a frame. Since the introduction of Flash Player 9 and the new AVM2, I’ve noticed a few changes to the elastic racetrack model and thought I’d share them. This information is based on research into Flash player internals as well as observations I’ve made playing around with the event and rendering model, but the full model hasn’t been confirmed by Adobe engineers. The basic premise of the original elastic racetrack is still the same.