[vtkusers] Performance VTK 4.4 vs. VTK 5.4.2, more info

[Affolter Martin]

Thanks for your replies. It seems that I am not the only one experiencing a performance drop in VTK 5.4.2 compared to VTK 4.4. As I mentioned before, we use VTK to visualize 3d-models in our CAD-Application. I have compared the time to visualize a certain model with 4.4 vs. 5.4.2. Except for some replaced deprecated methods, our code remained the same, so the differences must come from VTK. There is also a remarkable difference when interacting with the window. Unfortunately I don't have any values (fps) to present at this moment.

It looks like we're going to stick with 4.4 for now. Comments are welcome.

Here are the details:

1. Time to visualize model (includes creating actors and rendering the scene) (h:m:s)
-------------------------------------------------------------------------------------
VTK 4.4 release (measured 3 times):
0:0:6.266
0:0:6.922
0:0:7.032

VTK 5.4.2 release (measured 4 times):
0:0:22.516
0:0:29.438
0:0:26.110
0:0:27.032


2. Visualized model (screenshot)
--------------------------------
Entities	Faces	Edges	Vertices
1		20	51	34
2		137	370	240
3		211	523	321
4		25	66	44
5		104	299	197
6		104	299	197
7		86	237	156
8		26	69	46
9		246	680	448
10		81	231	154
11		39	111	74
12		284	761	486
13		84	243	162
----------------------------------
		1447	3940	2559
----------------------------------
Total number of Actors		7946
==================================


3. Used VTK-Classes
-------------------
Edges: 		vtkActor, vtkPoints, vtkPolyData, vtkPolyDataMapper
Faces(Meshes): 	vtkActor, vtkPoints, vtkPolyData, vtkCellArray, vtkPolyDataNormals, vtkPolyDataMapper
Vertices: 		vtkActor, vtkPoints, vtkPolyData, vtkVertex, vtkPolyDataMapper


4. Used Hardware
----------------
Intel Pentium D(ual core) 3.2GHz
2GB Ram
ATI Radeon X1300 Series

Regards
Martin


---

Original Message:

Dear VTKUsers

I've been looking into the vtkusers archive for a while now, and it helped me solve my vtk-problems in most cases. We use VTK in a CAD Application and decided to move from version 4.4 to the latest release, which is 5.4.2 at this time. So I downloaded the sources, made a VS2008 solution with Cmake and built the libs and dlls. Besides replacing some deprecated methods I did not have to change anything in our code. No compiler-warnings, no errors (of course).

When I tested version 5.4.2 against 4.4 I found out, that 5.4.2 takes about 3-4 times longer to visualize a 3d-model of some robot-arm than version 4.4 did. The rendering while interacting is also very, very slow. Can anybody confirm such a performance drop? If so, then I think we might stick to v4.4 a little longer, if not, then I'll have to figure out what went wrong in my tests.

Thanks
Martin
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