I'd think twice before spending a lot of $ on a porting job for a semi-auto pistol the size of a PPS. It may work but it may also cause problems with the function of the slide/pistol unless you use powerful rounds.
Mag-Na-Ports or porting is better for DA revolvers for carry-protection.
In the late 1990s, I owned a custom Beretta 96D .40 with a stainless steel ported barrel(extended). It helped balance the big 96D & improved marksmanship.
I toted it in a Aker shoulder holster.