[vtkusers] VTK 5.2 much slower rendering than VTK 4.2

[Andrew Wilford]

I had posted some requests recently about porting an existing VTK 4.2 app to
VTK 5.2. Having side-stepped the specific issues, I was able to get an image
rendered. I've noticed though, that VTK 5.2 seems to be much slower at
rendering scenes than VTK 4.2. Some testing showed times of up to 4 times as
long to render the same scene.

This result surprised me. Are there some compile/runtime switches that can
speed things up? This is for rendering simple polydata solids. If more
testing shows the same results then the upgrade will have to be abandoned in
favor of keeping VTK 4.2

This is on a Windows XP system.

Thanks,
Andrew