Choppy Animation and Scrolling Performance on "New iPad" (Retina iPad 3)

Question

I've been working on an iPad app that has gone through fairly extensive testing on the iPad 2. I recently obtained a "New iPad" (iPad 3), and the app feels significantly slower. Animations / scolling behaviors that were silky smooth in the iPad 2 now feel extremely stuttery on the new iPad.

I do a lot of the standard UI performance tips: using shadowPaths, drawing UITableViewCells using CoreGraphics, rasterizing views that don't change often / don't need to animate.

Are there any pitfalls I should watch be watching out for in transitioning my app to the iPad 3?

Update

I swore that I tried this before but removing rounded corners from my UIViews views ended up speeding the app significantly. clipToBounds also seems to be a significant performance hit (although strangely... setting a view's layer's maskToBounds seems to be okay, which makes no sense to me). Some combination of this and other tweaks seems to have resolved the issue.

Once I do a second visual pass over the app, I'll figure out a way to reimplement rounded corners in a more performant way.

Answer 1

4x the pixels, only 2x the fill rate. The maths says it all.