Adobe Acrobat - Large PDF Perfomance

Hi

I am developing a system to generate some large PDF files (about 80000 pages).

We have an old 3rd-party system that can generate those large files and keeps the file size around 150MB. Those files will then be opened in Acrobat (and plugins) for page-rotating/imposition/printing. The performance of those file is very good in Adobe Acrobat.

In my new system, the files are generated are around 150MB as well. However, the performance in Adobe Acrobat is extremely slow/laggy.

I did some research and some articles mention that the performance in Acrobat could be effected by the pages tree structure. My questions are:

• Can you help me to confirm if the page-tree structure will have any effect on the PDF performance in Adobe for large file?
• Is there anything else I need to be aware of to improve the PDF performance in Adobe?
• Are there ways we can balance the page tree (in Adobe or programmatically with PHP libraries)?

Thank you!