[vtkusers] Import time in Python

[Andrea Gavana]

Hello,

     I have recently installed VTK 7.0 to be used via Python 2.7 using the
excellent resources from Christoph Gohlke (http://www.lfd.uci.edu/~
gohlke/pythonlibs/). I have a considerably powerful machine at work - 96 GB
RAM, 8 cores, 64 bit Windows 7 Enterprise. However, executing the simple
command below:

import vtk

takes more than 7 seconds on this machine. I understand that there are
quite a few modules to import in the VTK hierarchy, but I was not expecting
such a dramatically slow operation. I also understand that this may not be
the perfect forum to post such a question, but maybe someone else has
encountered a similar behavior and he/she has some explanation for it.

Any suggestion is more than welcome, thank you in advance. I paste below
the results of profiling the simple import statement using the Python
profiler in this way:

python -m cProfile test_import_vtk.py


Andrea.


*File Name                            Import Time (seconds)*
vtkIOImage.py                        0.190
vtkIOExodus.py                       0.151
vtkCommonCore.py                     0.147
vtkRenderingOpenGL2.py               0.124
vtkRenderingFreeType.py              0.120
vtkIOInfovis.py                      0.113
vtkIOParallel.py                     0.106
vtkIONetCDF.py                       0.103
vtkCommonColor.py                    0.102
vtkFiltersStatistics.py              0.101
vtkFiltersVerdict.py                 0.100
vtkGeovisCore.py                     0.100
vtkIOAMR.py                          0.100
vtkIOXMLParser.py                    0.099
vtkIOMovie.py                        0.097
vtkCommonDataModel.py                0.096
vtkCommonMath.py                     0.091
vtkCommonMisc.py                     0.091
vtkInteractionWidgets.py             0.091
vtkRenderingVolume.py                0.090
vtkCommonComputationalGeometry.py    0.088
vtkFiltersModeling.py                0.087
vtkIOMINC.py                         0.087
vtkIOSQL.py                          0.087
vtkInfovisCore.py                    0.087
vtkFiltersHybrid.py                  0.085
vtkIOPLY.py                          0.085
vtkFiltersCore.py                    0.084
vtkImagingGeneral.py                 0.084
vtkRenderingLabel.py                 0.083
vtkImagingMath.py                    0.082
vtkInfovisLayout.py                  0.082
vtkCommonExecutionModel.py           0.081
vtkIOCore.py                         0.081
vtkFiltersGeneric.py                 0.080
vtkIOEnSight.py                      0.080
vtkViewsContext2D.py                 0.080
vtkFiltersAMR.py                     0.079
vtkFiltersParallelImaging.py         0.079
vtkImagingCore.py                    0.079
vtkImagingFourier.py                 0.079
vtkInteractionImage.py               0.079
vtkInteractionStyle.py               0.079
vtkRenderingContext2D.py             0.079
vtkImagingColor.py                   0.078
vtkRenderingImage.py                 0.078
vtkRenderingVolumeOpenGL2.py         0.078
vtkFiltersPython.py                  0.077
vtkIOParallelXML.py                  0.077
vtkImagingStatistics.py              0.077
vtkViewsInfovis.py                   0.077
vtkFiltersSources.py                 0.076
vtkIOVideo.py                        0.076
vtkFiltersFlowPaths.py               0.075
vtkFiltersParallel.py                0.075
vtkFiltersSMP.py                     0.075
vtkFiltersSelection.py               0.075
vtkIOImport.py                       0.075
vtkImagingHybrid.py                  0.075
vtkRenderingAnnotation.py            0.075
vtkDomainsChemistry.py               0.073
vtkFiltersImaging.py                 0.073
vtkRenderingCore.py                  0.073
vtkIOExport.py                       0.072
vtkIOLegacy.py                       0.072
vtkRenderingContextOpenGL2.py        0.072
vtkCommonTransforms.py               0.071
vtkFiltersGeneral.py                 0.071
vtkIOLSDyna.py                       0.071
vtkImagingMorphological.py           0.071
vtkImagingStencil.py                 0.071
vtkIOXML.py                          0.070
vtkImagingSources.py                 0.070
vtkFiltersGeometry.py                0.069
vtkFiltersHyperTree.py               0.069
vtkFiltersProgrammable.py            0.069
vtkCommonSystem.py                   0.068
vtkParallelCore.py                   0.067
vtkDomainsChemistryOpenGL2.py        0.066
vtkFiltersExtraction.py              0.066
vtkRenderingLOD.py                   0.065
vtkFiltersTexture.py                 0.063
vtkViewsCore.py                      0.061
vtkChartsCore.py                     0.060
vtkIOGeometry.py                     0.059

*Total                                7.119*
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