Currently I am developing a web based application that uses EXTJS 3.0 library. It's a pretty big web app, with enterprise level functionality.

I was wondering if I actually use Adobe AIR to build my application UI, instead of hosting it on the web server. Does it actually make it faster?

For instance, I design my web app in the Adobe AIR but all the data requests and posts will be made to the server. Any advantages or disadvantages over that?