Compress VTK or VTP files, allows to select the data type (binary, ASCII or appended), the level of compression (between 0 and 9, the difference however is barely noticeable) and enable the use of the wildcard (*) with SlicerExecutionModel.
Example of USAGE: ./VTKCompression -e binary -x vtp -c 3 -f /Data/*.vtk
NB: The wildcard (*) works in command line. It is not available from within Slicer and that tool should probably not be used as a Slicer module even though it is based on SlicerExecutionModel.