not much, if it is done by a good guy.
had 1 a few yrs ago. 2 small incisions about 3/8" each, one stitch each. somewhat sore /painful the next day, enough to take a pain pill.
did it under local, took about 30 min.
went to work the next day without a major problem ( office type job ), was sore for about 7-10 days.
And then I know a couple of guys who could barely walk for 2 weeks.
I am not sure the docs know how much trouble the guys have, but their office staff do. They are the ones that take the calls.
Ask around & you will see that a lot of guys have been "cut". Use a doc that has the best rep for no post op pain.