I am using an Asus n-series Core i7 750GB. Point is the document needs to run on all types of computers, since it is a file created for a client.
I did some more tests and noticed two things:
1) Reducing amount of interactive elements does help somewhat
2) not only interactive content needs time to be loaded on the page, but also content like text and images. They load in after opening the page. This usually does not appear with print PDFs. Can I get rid of this or is it sth that belongs to interactive documents?