IOS 8 Table View Controller performance issues?
After updating to iOS 8, my app has severe performance issues when scrolling in a UITableView - it didn't at all on iOS 7. It seems to lag or constantly jump a little.
It affects both older (2nd gen.) and newer (4th gen. Retina) iPads, but not iPhones, as my iPhone 5 scrolls fine through TableViews constructed in the exact same manner.
Important: It seems to only affect UITableViewControllers presented modally in a form sheet - not table views created manually somewhere else in a default UIViewController. Not even a modally presented form sheet of UIViewController with a custom Table View (as a property, for instance) is affected.
Instruments says around 3% of CPU time goes to cellForRowAtIndex method, with that one being the most consuming method. Of that 3%, 75% goes to the line.