I don't think SEO quantity is the problem.
GS Tech Support looked at the file and said this was normal performance.
Please watch a screen recording and see for yourself.
The biggest slow down's i've identified occur in plan when changing layer view combinations, and renovation palette options. Changing stories also can take a long time, but usually associated with a reno status change.
3d performance is acceptable; at the end of the clip you can see the openGL and graphic overrides are smooth and responsive.
Have a watch. Sorry its not Oscar worthy material.
https://www.dropbox.com/s/t42md581iq86ho0/GBL5%20Performance%20Movie.mov?dl=0
Either way, it is unworkable.
I've tried:
-Saving file as .PLA to clear out caches.
-Purging unused attributes(that's painful)
-purging attributes that have complex vectorial hatches (my 3d docs look more cartoonish than ever.) though I've added a few back in. How else am i going to show batt insulation in a curved wall?!?
-splitting off the layout book and bringing in the model as a hotlinked module. Layout book is sluggish but acceptable, Model remains unusable (its what i made the movie from.
-I considered merging the file into a new "clean" file as a way of eliminating all the SEO, (and saved views, and dimensioning and annotation etc.) but that is a last resort.. which i suppose is next.
Open to other suggestions/consultations to get the file usable again.