expeditious

adjective2

1. •
   Fast, prompt, speedy.

   • Our coachman and horses are so extremely expeditious!—I believe we drive faster than anybody. — 1815
2. •
   Completed or done with efficiency and speed; facilitating speed.

   • Now, there was a sort of rough-and-ready law in Ireland in those days which was of great convenience to persons desirous of expeditious justice[…]. — 1844