[vtkusers] Suggestions for implementing this new approach ?

[John Biddiscombe]

>To do that we tried vtkAppendPolyData but its way too
> slow.

vtk appendPolyData should work ok, you should check out the memory allocation that occurs near the start of the filters execution. It may be failing to allocate enough for all the datasets which would cause it to keep reallocating as the size grows. Alternatively, it may be allocating the wrong amount (usually it allocates too much, and with many many datasets,it may try to consume your entire system hence causing slowness)

JB