The phrase "swift end" means that something happens quickly and without delay or hesitation.
Sentences with «swift end»
This method either reinvigorates the conversation, or brings it to a mercifully swift end. (edutopia.org)
Behavior that was quietly sanctioned for years has suddenly led to the swift end of careers. (politico.com)
He called for a «swift end» to carnage in Syria, demanding that aid be delivered to the needy there and calling for «fitting conditions for the returned and the displaced». (premierchristianity.com)