May its not so bad, as it also depend on the photo itself (more exactly the camera body/raw type) and also about the megapixel count.
I post measurements in that thread: Budget GPU for PL about Camera body/Raw types, and mask (both non AI and AI) performance ratios and DP3 vs DP3 XD performance ratios.
If you drop the raw + dop here or share via some drive, i can check in my budget system (Intel Arc B570) to get some reference / processing time ratio. Can be interesting.