Not to mention, previously known length is all you have to go on. Nothing in the during-compile output will give an accurate estimate of the time remaining.
Sometimes vvis goes nuts and takes 3-4 times longer to complete for no reason that I can discern, and I normally only catch it when I see the "1..2..3.." stuff going much slower than normal.
Yeah, there's no timestamp going, but the output can be useful.