Agree if you have a larger tractor the Stego 285 will get the job done fast, add dual tires and large weight if you can to your tractor.
If you have a medium or small tractor I like the expensive vibrating compactor (forget the name) in fact I put one on the front and rear. Works fast as well.
Agree with the posts above, key to the speed is filling the bunker to the top, giving you a level flat zone to zoom back and forth fast.
