I have a report that uses over 300 objects on a page, attached to over 100 bookmarks. These are all attached to buttons. This was a test case to see if it was possible. What I noticed is that at some point I could only press a few buttons before the report canvas goes white and locks up. At which point I have to load the task manager to kill. The same is true when editing a visual or bookmark; I can only modify a few before it begins to slow down more and more until it freezes with a white canvas. This occurs in both the Decktop and Service engines.