[vtkusers] VTK 4.4: VS2008 vs. VS2005

[Affolter Martin]

Clint

Yes, the model I visualized has around 8000 actors (meshes, edges, vertices). I've read about slower performance in 5.x with a large number of actors. But this problem here is different. What I don't understand is why the very same source-code (VTK4.4), built by two different compiler-versions (VC8, VC9), results in a performance-drop of factor 2.

Both VS-Solutions are created by Cmake 2.6 with the same configuration (except for the target VS).

I'm just trying to find out, if other people have experienced the same and if there's an explanation to it.

Martin

-----Ursprüngliche Nachricht-----
Von: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] Im Auftrag von Clinton Stimpson
Gesendet: Mittwoch, 23. September 2009 17:20
An: 'vtkusers at vtk.org'
Betreff: Re: [vtkusers] VTK 4.4: VS2008 vs. VS2005

On 09/23/2009 08:49 AM, Affolter Martin wrote:
> Hello
>
> I did some time-measuring for creating and rendering a given 3d-model (CAD-Application). The goal was to check the performance of VTK 5.4.2 vs. 4.4. I wrote about that in an e-mail earlier this week.
>
> This time, I measured times with vtk 4.4 dlls built in different Visual Studio Versions: VS2008 (VC9) and VS2005(VC8). The measured times using the VC9 compiled dlls are about twice as long:
>
> VTK 4.4 VC8: 6-7 s
> VTK 4.4 VC9: 12-13 s
>
> The application sourcecode did not change. It is a release-version, built in VS2008 (VC9). I built to versions of it, one linking to the VS2005, the other to the VS2008 libs. I did not mix vtk-dlls, I can assure that using looking at the dependencies.
>
> Has anyone experienced a slower perfomance with vtk dlls built in VS2008 instead of VS2005?
>
>    

I don't think its a visual studio issue.
I've seen slowdowns like yours going from VTK 4.x to VTK 5.x if there 
were a large number of actors.
If I remember right, last time I profiled it, (a long time ago) the 
slowdown was related to information key stuff.

Do you have a large number of actors?

Clint

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