Faster than a speeding bullet.

Tried to get an image of a warbling vireo doing its splash and dash bath.

1/500 sec at 12 frames a second and it is badly blurred.

Talk about a fast bath.

Vireo gilvus

Warbling Vireos have a good name—the males sing a fast, up-and-down, rollicking song that suits the word “warbling.” The early twentieth century ornithologist William Dawson described the song this way: “fresh as apples and as sweet as apple blossoms comes that dear, homely song from the willows.” The highly variable song usually ends on a high note, leading the birder Pete Dunne to describe it as sounding “like a happy drunk making a conversational point at a party.”

source - Cornell Lab of Ornithology.