Some informations more :
In a programmable filter, I execute the same following script on both
paraview 3.8.1 and paraview 3.10.0 - binary releases for win32.
The input is a MultiBlockDataSet, 4.5e6 nodes.
import time
balise = time.time()
from paraview import vtk
i = self.GetInput()
o = i.NewInstance()
for numbloc in range(1, 26):
calc = vtk.vtkArrayCalculator()
calc.SetInput(i.GetBlock(numbloc))
calc.AddScalarArrayName('ro',0)
calc.SetFunction('ro^2')
calc.Update()
o.SetBlock(numbloc, calc.GetOutput())
self.GetOutput().ShallowCopy(o)
print time.time() - balise
With Paraview 3.8.1 --> 1.17 s
Whereas with Paraview 3.10.0 --> 19s ..... !!!!!!!!!!!!!!
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