Why is SegmentStatistics slower in Python console?

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SegmentStatistics computation runs at least at half speed in the Python console than in the module’s widget.

With a single segment drawn with the Paint tool at 3% and a sphere brush, the execution time is 0.40 secs in the module’s widget and 1.08 secs in the Python console with the following call :

import SegmentStatistics
segmentation = slicer.util.getNode("Segmentation")
volume = slicer.util.getNode("CTA-cardio")
logic = SegmentStatistics.SegmentStatisticsLogic()
logic.getParameterNode().SetParameter("Segmentation", segmentation.GetID())
logic.getParameterNode().SetParameter("ScalarVolume", volume.GetID())
logic.computeStatistics()

The difference increases more than twofold with multiple segments.

It’s not a fundamental issue requiring a fix in the module itself, I’m more interested to know if it can be remedied by the caller in his code.

Thank you for any suggestion.