I tried the 5000layers drawing in 2011 32-bit with a Quadro FX3700 on Vista 32-bit. It was noticeably lagging compared to the 1000layers drawing while doing simple panning. Opening the drawing did not seem to be an issue.
I enabled hardware acceleration using the Manual Tune dialog, no effect.
Then I noticed the little light bulb icon for this setting was still off so I turned it on with a left-click. BTW, I find that annoying, first, it should be a right-click and second, it should have been on when enabled via the dialog. No change in performance though.
Then I remembered that harware acceleration changes were never noticeable until AutoCAD was restarted when I was testing with Point Clouds. AutoCAD should warn you about this. So I restarted AutoCAD. No lag while panning after the restart.
There could be multiple issues. HW acceleration, video card, and AutoCAD version. I think Autodesk has been changing what gets accelerated and what doesn't and has moved away from vendor specific hardware acceleration and now only recommends the "Autodesk" hardware acceleration instead of NVIDIA or AMD/ATI custom drivers.
I noticed in Civil 3D 2011 that you get a lot of flickering after update 1.1 unless you turn HW acceleration off. But I've also heard that you can then turn it back on and the flickering will not come back, I haven't verified that yet.
I found something extremely interesting. Hopefully you can follow me here.
Check to see if reconciling the layers has any affect.
If this corrects the problem you can thank Bruce (klugb) for his post in the Civil 3D forum. http://forums.autodesk.com/t5/AutoCAD-Civil-3D/Slo
I have been experiencing the same issues opening files which i did not associate to layers which makes me curious. I am running 2012 64 bit on Dell Precision T3500 Intel(R) Xeon(R) CPU W3503 @ 2.40GHz - 15 GB Windows 7 Pro 64 Bit OS.
My video Card is 256 ATI Fire MV 2260, Could the lack of memory have that much of an affect on opening files?
We have machines running 2009 and 2011 32 bit with 2 Gig on windows xp and they open files much faster.
Any suggestions on this matter would be greatly appreciated.
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