KStars can hide objects and allsky overlays when I move my view. Is it possible to activate this feature for zoom too? The DSS colored allsky overlay (very cool feature btw) is activated on my computer which makes the zoom very laggy (even on my notebooks i7 cpu) and I zoom too far in/out. There are no problems if I deactivate the overlay.
Unless you have all these images cached, you should expect some overhead with DSS overlay since it has to load the progressive overlay and draw it. I guess there needs to be a way to "detect" that zooming event is over, perhaps with some kind of timeout. But this is not easy to incorporate into the current code base.