Problem

A busy icon appears every time the mouse goes off the axes and the cursor is cleared.
For image files ~100MB, the busy icon lasts 1-2 seconds each time.

Sample code:

frommatplotlib.widgetsimportCursorfrommatplotlibimportpyplotaspltfrommatplotlibimportcmfromPILimportImagefig,ax=plt.subplots()img=Image.open(r"Path to large image file ~100MB")ax.imshow(img,cmap=cm.gray)cursor=Cursor(ax,useblit=True,color='red',linewidth=1)plt.show()

Proposed solution

I think the behavior of not clearing the cursor when the mouse goes off the axes is acceptable.
It is also consistent with the behavior of the similar classMultiCursor which doesn't callcanvas.draw.

If accepted, the following lines can be removed andneedclear will also be removed: