My requirement is to build a social game like FarmVille using LAMP stack. For frontent ActionScript 3 part, I want to consider PureMVC as MVC framework. What are the pros and cons of using PureMVC framework over building the game without framework ? I need to consider following points : 1. Ease of use 2. Utilities and benefits of using PureMVC , or complications 3. How good is the performance in terms of memory usage by the SWF ?