Hello Matt,
I am not sure I know what you mean by growing th database but I did not perform any activity to deliberatly grow the database.
Amazingly, no dwontime was recorded. The defrag took about three hours. I do not know whether its important but the server is a virtual machine.
In my case, the DB file had over 400 fragments as reported by Disk Defragmenter. I used Windows Defragmenter for this task.
Br. Kenneth Igiri
https://kennethigiri.com
All nations come to my light, all kings to the brightness of my rising