I have a file with I'd say 25 odd viewports in it. Total file size is about 6mb. Running a dual 3ghz with a gig of ram, it takes about 90 seconds to open the drawing.. I went in and made a copy and removed all the viewports and it loads in about 20 seconds. File size only changes a few hundred K..
Yep rebuilding the viewport graphics initially may take a little time (minute and a half), but once cached they should pop pretty quick.
BTW, 90 seconds is fast people, very fast for a large file. Okay show of hands, who remembers V1.4 on a 8088 processor, 512k RAM, running at a blinding 0.4 MHz... 90 second loads, yeah right, try 45 minutes for a 200K file,
a n d
i t
r e g e n e d
f o r
e v e r y
z o o m
o r
p a n......