Did you ever want to improve the way we implement the API calls in the application? Let me show you.
Playgrounds and the Vision framework are both great tools. Why don't combine them?
What if I told you that you can detect the contents of an image using the Vision framework?
If you want to know where people will focus their attention while looking at the image. Or you want to detect objects that stand out from the photo. Then the saliency detection is for you.
Code optimization is not easy. Why not use all the help you can get? Check why Performance Tests are what you need.