repaint() slow when offscreen window is moved back onscreen

[Erick Crouse]

I have a window which is fairly large and sometimes a portion of the
it will extend beyond the physical dimension of the screen. When I
bring the window back into view onto the physical screen dimension I
notice the repainting of the portion offscreen takes some time
(fraction of second). I do not believe clip is useful because really
the entire window needs to be repainted since the entire window is
moving. I can understand using clip with painting if the window itself
was stationary.

Thanks so much for any advice,

-V