Most smaller stuff is pretty easy to gauge speed in my opinion. Think about it like a flat low jump. Also if it's a dub kink it's down a bit as well. Maybe don't try it on the longest steepest dfd first where if you come up on the kink your legs will snap off, but otherwise not too bad.
If it's some ridiculous gap I'd say airing it to the side to gauge speed might not be a terrible idea, if nothing else to know the feel of hitting the jump and know that you'll be 100s if you hit it like that.
Otherwise it's pretty much like any other slide just faster, and if it's a huge one maybe some compression.