Hi I was hoping V6 would be faster than V5 on files like this, but it turns out it is much slower.
Both in wireframe and rendered. (didn’t test any other modes)
I can send the file in a PM to a developer, but I can not post it there.
It this all lines? We haven’t focused a whole lot on performance yet. That said, there were some changes over the last week in the display architecture that may make a difference for a model like this.
Hi Steve, it’s one big block with lots of blocks in it, all mesh solids.
But why ask when I can send it to you so you can check it out for your self? 
It’s a typical Revit file that architects make, clean and complex at the same time.
So… where do you want me to send it?
You know my email address by now, don’t you?
Touché 
I didn’t know if you wanted it uploaded, on a PM here, or an email, so I’ll send it to steve@mcneel.com. Tell me if it doesn’t reach you. It’s only 7MB.
Hi Steve, did you get it and did you take a look at it?
For the record, my computer is a dual Xeon running Windows 10 with a Quadro 4000.
I did get your email, but haven’t had a chance to look at the model yet. Hopefully next week. Thanks