Flex Performance Guidelines Avoid nested container - it is resource intensive for Flex to figure out the x,y of the elements via sizing and measuring algorithm. Tips: hard-code x,y and width and height. Naviagtor containers have built-in deferred instantiation – eg. Accrdion, TabNavigator, ViewStack. Progressive layout improves initialization experience using queued creationPolicy in the deferred instantiation architecture. UI element are loaded [...]