Sorry but I think the iframe is a very bad practice:
1- Lose the interaction with the site.
2- Consume the same memory, and for user waiting 5 or 10 minutes for browser decide to empty the memory is horrible.
3- We need interaction Normal Web With the C2 for a better designs or web aplications
I have a magic temporary solution :P (C2 MAGIC).
Thanks guys for the intension to help me.
Sorry for my english.