Prior to today, I last exported a space which contains about 1,500 pages in November, 2018. At that time the total size of the PDF export was 5.5MB.
Today, I tried to export the same space to PDF and the resulting PDF output was 1.4GB. Nothing substantially has changed in this space in the past two year, a few dozen page creations, but nothing that would explain such an astronomical increase in size.
The pages are almost heavily text-based, very few images, and are all based in the "old" editor. Each does contain a few macros (e.g. "info", "code block") available in the old editor.
What could explain this growth? How can I get it down to a size that I can actually distribute again?