Fast and optimized PDF viewing on iOS: tips and recommendations

Hello everyone! I'm developing a PDF reading app on iOS and have encountered performance issues. I'm using the standard `PDFView` from PDFKit, but when opening large PDF files (100+ pages with images), the app lags significantly, especially during scrolling and zooming. Memory grows uncontrollably, and animations become choppy. Here's my current code: ```swift import PDFKit class PDFReaderViewController: UIViewController { let pdfView = PDFView() override func viewDidLoad() { super.viewDidLoad() pdfView.frame = view.bounds pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight] view.addSubview(pdfView) if let url = Bundle.main.url(forResource: "large_document", withExtension: "pdf") { ```