Image (Ext.Img) size for Ipad 3 (retina)?

[Mike6679]

I have an Sencha app I'm building that basically has a toolbar with icons in it docked to the bottom and a carousel above it with img panels for it's items. My images are all high resolution designed for the ipad3. So for example a carousel item's image size is 2048 width. I'm using Chrome for viewing and debugging my app as I go. I have to zoom out in the Chrome Browser to view my app clearly because my carousel item img's are so large. In my img panel config I specify a width of 2048px. My question is how will this translate on the ipad3 retina display? Will it automatically show it correctly with a width of 1024 with just a better resolution or do I have to specify a width of 1024px in my img panel config?
I would try this myself but I have not been able to successfully package my app for the ipad yet .....

[mitchellsimoens]

A major concern is file size here also. Such large images sizes will live in memory and force the CPU/GPU to render a lot of data.

[Mike6679]

Hmmm, you are suggesting that Apple put out the ipad 3 which is designed for high resolution images , but it can't handle them? Also my original question still stands, how do I specify my images in my image panel? --- as 2048 width or 1024? Does the ipad3 automatically size high res images to the correct width?

[Mike6679]

OK we were able to get high res images into our Sencha app and onto an ipad3 and have them sized correctly. Problem is now the ipad 3 is choking on the carousel swiping and sliding animations. I need some advice from Sencha: Is this a limitation of the ipad 3 (which doesn't make sense because the ipad 3 is designed for high res images) or is there something I can do in my app to increase performance?