A key for enabling low-priority GPU use.
- iOS 8.0+
- macOS 10.12+
- tvOS 9.0+
- Core Image
The value for this key is an
NSNumber object containing a Boolean value. If this value is
true, use of the Core Image context from a background thread takes lower priority than GPU usage from the main thread, allowing your app to perform Core Image rendering without disturbing the frame rate of UI animations.