To reiterate - I downloaded the version you linked to, and ran it in My Documents instead of Dropbox, and had no major improvement in perceived speed. There might have been some improvement but if so it wasn't much.
Also, I was running it under my VPN for work which requires HTTP proxy for Internet access, so it would probably not have been able to contact the server if it were downloading parts. I just tried it without the VPN and no proxy needed, and it's still slow, so I don't think that's it. Anyway, my parts library contains all the parts in the model.
I still think it's something dumb Windows is doing. Maybe it's the 64 bit vs 32 bit thing. Do you have a 64 bit build of LDView?
Also, I was running it under my VPN for work which requires HTTP proxy for Internet access, so it would probably not have been able to contact the server if it were downloading parts. I just tried it without the VPN and no proxy needed, and it's still slow, so I don't think that's it. Anyway, my parts library contains all the parts in the model.
I still think it's something dumb Windows is doing. Maybe it's the 64 bit vs 32 bit thing. Do you have a 64 bit build of LDView?