title: Should I write a new application in Flex4/Spark if performance is a bigger consideration than skinning?
body: <p>I've worked extensively with MX and Spark frameworks and both work fine for me. I am about to start a very large project in Flex where speed and file size are going to be critical factors. I am not going to use Adobe Catalyst.</p>
  
  <p>Is there any reason I should use Spark for this application rather than MX?</p>