Nines may be wussy in-terms of bullet diameter, but they run at relatively high pressure. If a 45 ran at that pressure...they'd probably call it a 454.
It all depends on what you're trying to do. If you want to keep the muzzle down to improve double tap speed then porting would help. But your eardrums may be less happy.
If you're trying to make recoil lighter while knocking over cans, get a 22.