GMSH GUI slow on mouse wheel
On Windows, the GMSH GUI is slow on mouse motion with larger models.
Load the attaced file into GMSH GUI and try to zoom the model with the mouse wheel.
There is a very long delay until the view is updated according to the mouse wheel.
If you keep the mouse stil and only zoom in or out, it works fast.
If you reposition the mouse over the model and then zoom in or out, the delay comes back.
I think, a similar issue happens with trying to rotate the model view.