Data binding performance in AS3 / Flex

Question

What are the various levels of performance in the different ways of binding?

• ChangeWatcher.watch
• addEventListener
• BindingUtils.bindProperty
• MXML {}

Answer 1

Flex's databinding is very heavy as it uses the magic strings event system that adds a lot of extra code in addition to other performance crap it adds. If your looking for performance bind manually. Here's a very in depth report on your exact question though: http://www.slideshare.net/michael.labriola/diving-in-the-flex-data-binding-waters-presentation