Hi all... I've been using ExtJs for some while now and I love it. But we've gotten to a point where we are trying to eek every little bit of performance possible out of our page render times. and as great as the ExtJs framework is, it is a huge performance hit due to its size. I'm interested to know if I should anticipate any problems on using Ext-core for initial loading (most page wouldn't need much more than ext-core to initiate menu's and what not) and then later in the lifecycle dynamically bootstrap the rest of the ExtJs framework so that I can benefit from Ext.Direct, Ext.Window, etc.... any help on the matter would be appreciated.