Like a dose of salts
Definition 1 of 2
Pro Tip 1/3Speed Implication
Used to describe something done with surprising quickness and effect 
The changes in the company were implemented like a dose of salts.
Pro Tip 2/3Often Positive
Usually implies approval of the speed and efficiency of the action. 
He cleaned the whole house like a dose of salts before the guests arrived.
Pro Tip 3/3Physical Action
Commonly used for tasks or actions involving physical movement or activity. 
She sorted the files like a dose of salts.