On fish that are keeper size I like to push the line down thru the gill then with my finger I'll pull the line till the hook eye is thru the gill then push the hook out using the shank.
This is not too time consuming and seems to be of little or no stress to the fish. Obviously it is easery the bigger the fish and the smaller the hook. Try this the next time you deep hook a fish it's worked well for me.
Stoner.