It's still going to be faster than creating and moving around a bunch of NSViews simply because the WebView (native WebView, not Electron) renders the entire content at once, directly on the graphics pipeline, skipping all layout and compositor steps that get done on normal NS(Text)Views.

The key point here is to use the WebView only for the text view. Where it goes wrong is when people start writing entire interactive UIs in the WebView.

The other option would be PDFKit, but most people aren't nearly as comfortable programming with PDF as they are with HTML.