I'm not a fan of porting. A friend of mine had a ported six-inch .357. I shot it a few times and I hated the flash in my face. I found it too distracting. On your snubbie, the ports would direct the gasses (and powder particles and lead shavings) upwards. Think of how you would be shooting. If you are shooting from the hip (point shooting) you might cause damage to yourself. At other times, that gout of flame shooting upwards might distract you (or ruin your night vision) when you need it most.
Porting works best with a high pressure round. Your .45LC does not qualify as a high pressure round. If you need to attenuate the recoil of a full Magnum load, porting might be nice, but not in .45 colt.
I also shoot a 3" snub, mine in .38. I prefer the balance and the longer sight radius of the three inch. No, my 3" is not ported. I wouldn't want it if it was. I also optimize my loads for low flash powders. I don't want any distraction in my defense gun.