quickest

adjective

1. Moving with speed, rapidity or swiftness, or capable of doing so; rapid; fast.“He's a quick runner.”
2. Occurring in a short time; happening or done rapidly.“That was a quick meal.”
3. Lively, fast-thinking, witty, intelligent.“You have to be very quick to be able to compete in ad-lib theatrics.”
4. Mentally agile, alert, perceptive.“My father is old but he still has a quick wit.”