It's funny- when I was starting to play golf, I used to fire through two jumbo (120+?) buckets in 45 minutes and wonder why I was done early. Now I'll split a large (~90) with a friend, hit maybe 30-40 of them in an hour, he'll hit the rest. Take my time setting up, getting the grip, aligning, checking it out, etc.
A while back I saw an unedited video of Xander Schauffle on the range at Kapalua (wish I could find it again). I think his fastest time between shots was 45 seconds (if even that fast). Every shot was set up, aligned, checked alignment with pointing the arm downrange, practice waggle, etc, swing. I'd like to someday be this slow.