Navigate to Edit>Preferences>Page Display>Rendering>Select Smooth Text to Monitor and see if that fixes it.
I've never seen a page render so slowly (or rather, just go to sleep and pick up later). Intriguing...
Well, at the core of the page it draws a line from 57.31 153.10 to 271.32 207.10. Which is fine. But it does the same line just over 100,000 times. This is going to take a while, with the best will in the world.
Dear Test Screen Name,
may I ask how you know that the same line is drawn 100 000 times? How did you figure this out and can I remove the 99 999 lines myself?
I Analysed the PDF with special tools (not public). There is no realistic prospect of removing all but one of the 100000+ lines, this must be fixed in the original or PDF creation tool.