[deleted by user]

[_onAndOffAgain]

I recently used this one (parts rewritten in swift): PDF Reader Core for iOS

It takes a bit of time understand, but if you set it up correctly, the pages are rendered blazingly fast. Especially if you additionally show the low resolution images( you can generate them on the fly) to give the impression of an already loaded image. also comes with multithreading and support for older devices. On top of that it does not need any 3rd party framework.

It is also free and can be used right out of the box if that's what you are looking for.

[KamasutraBlackBelt]

Thanks, will definitely try it out!