pressed for time vs whistle-stop

pressed for time

• in a hurry, without spare time. 

whistle-stop

• Extremely brief and hurried. 

• To make a brief stop on a campaign tour to make a speech or perform some other type of public electioneering. 

• A small train station. 

• A brief stop on a campaign tour to make a speech or perform some other type of public electioneering.