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 in the successively [...]

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