WWDC26: Build a responsive camera app that launches quickly | Apple
Apple's iOS 26 Deferred Start API speeds camera app launch by initializing only the preview output first.
“the single most important factor in making a camera launch feel fast is how quickly the preview frame appears on the display”
An Apple WWDC26 session details techniques for fast-launching camera apps, including the new iOS 26 Deferred Start API that postpones non-preview output initialization until after the first frame renders. It is a mobile engineering and developer-tools talk with no meaningful AI signal.