What is the difference between these 2 solids?

[Marvin7]

Attached is an AutoCAD 2010 .dwg that has two sets of mostly indentical cylinders that represent PVC piping. The solid type for all is "extrusion".

 

Yet, when I select the PVC on the right and start a move command, the preview geometry draws with a smooth frame rate, but trying the same move command on the PVC on the left yields a much worse, jumpy frame rate (and I confirmed this on a second PC too). It's as if there's something different between the two sets of geometry, yet I can find no discernable difference.

 

Anyone have any ideas?

And the problem is actually twice as bad as this because I removed about half the geometry from the .dwg I'm posting.

WHAT MAKES THESE PVCs DIFFERENT_2010.dwg

[ReMark]

No problem with either one of them on my system using plain AutoCAD 2014.

 

There's only an eight object difference between the two. Negligible.

[Marvin7]

No problem with either one of them on my system using plain AutoCAD 2014.

 

There's only an eight object difference between the two. Negligible.

Hmmm, thanks for the reply. Can anyone else confirm? Like I said, I even went over to a co-worker's computer (with different hardware)...he opened the file and his did the exact same thing. I suppose it's possible ReMark's PC is so fast that the differences don't don't show up. My system is no clunker though.

 

I suppose changing to a more intensive visual style like "shaded with edges" could help bring out the difference if there is one, though mine shows the difference just fine on "realistic".

[SLW210]

I had the problem initially. Deleting the ones on the right, the ones on the left did fine.

[Marvin7]

I had the problem initially. Deleting the ones on the right, the ones on the left did fine.

Ok, and now I've noticed that, re-opening the attached file, I no longer have any problem with either the left or right PVC. Yet my original file (the one I did the "Save As" on to create the attached file) still has the problem badly.

 

I'm confused. This might be one of those things I never figure out.

 

SLW210, just FYI, my original drawing doesn't even have the "right" set of PVC, and it still has the issue. What originally happened is that I opened another version of the drawing (for a different sized unit that my company makes) and noticed that drawing didn't have the issue. So I copied that geometry into the original drawing that had the issue, expecting the copy-pasted geometry (aka, the "right" PVC) to inherit the issue...and was shocked to see the two different sets of geometry behaved differently...even though they were identical from what I could tell (save for the negligible difference that ReMark pointed out).

[nestly]

I was able to MOVE either or all with no jumpiness Using AutoCAD2011

[ReMark]

Well it can't be anything to do with the amount of RAM since it ranges on the different systems form a low of 4GB to a high of 12GB.

 

I never changed the visual style; left everything the way you had it. Tested it twice.

[Marvin7]

Thanks, all, for trying out my .dwg. But I guess there's not much for you to troubleshoot if the problem isn't repeatable. I'll update the thread if I ever figure it out.

[mikekmx]

I was able to MOVE either or all with no jumpiness Using AutoCAD2011

 

same here with 2008 on a laptop

[SLW210]

Little more time this morning to look and I am having 0 problems today.