You can add trash until the compartment is full and the compactor will not compact the trash any further. The compact cycle time will be shortened as the compartment fills up. During full cycle the ram travels 2/3 of the way down into the trash bucket.
With Humalog's short action time of 3  hours, covering postmeal highs with more insulin can be considered as soon as two hours if a meal dose have been underestimated. Of course, not as much sliding scale insulin would be needed here as before a meal, because some of the meal dose is yet to work.
How fast does Xanax work. Xanax reaches its peak level in the blood in 1-2 hours. At that point, Xanax has taken full effect. Sometimes people will crush and snort the powder from the tablets to try to get more immediate effects, but this is dangerous.