Flex / Pure AS3: Components and drawing

Hi,

I have mainly been developing pure AS3 application and have recently started to explore Flex and I was wondering if I could get a few pointers on some elements:

  • in terms of performance, is there a difference between using the Flash CS3 components and the Flex components. I know that the Flex components are “heavier” in terms of memory usage but what about speed? Do they perform better?
  • similarly is there a performance difference in drawing using pure as3 and using mxml?

I have a pure AS3 app with some custom UI components (based on the CS3 components), I am wondering if a switch (and hence re-write) of the UI in Flex is worth it. I know it’ s quite a vague/broad question but I would appreciate some opinions.

Thanks.