I'm sure you could improve on it. You have skill as you use DXO on a regular basis. When PL3 was still usable I did use it for tough NR jobs. No doubt it's an excellent product.
Keep in mind that PL3 only had PRIME NR. DeepPRIME which was introduced in PL4 is very significantly better than PRIME by any measure. The only reason that PRIME is still included in PhotoLab is because DeepPRIME requires an acceptable graphics card GPU to perform well, otherwise it uses the CPU only and is very slow.. PRIME only uses the CPU but it is much less intensive so it runs a lot quicker than DeepPRIME when it is also processing using the CPU only.
On my mid level machine with an nVidia GTX 1050ti it takes around 21 seconds to process a DeepPRIME file and around 35 seconds to process a PRIME file. However, if my card's GPU wasn't supported DeepPRIME would take almost 70 seconds on my computer. The key to speeding up processing with DeepPRIME is to batch all your images using the optical tool settings only. and then export them all to DNG files and walk away. Then later you can edit your DNG files in PhotoLab and export them to Tiffs or Jpegs in only a couple of seconds each.. There is a special export in PhotoLab explicitly for that purpose. The optical tools included in this export are Lens Distortion, Vignetting, Lens Sharpness, Chromatic Aberration and it also includes Denoising.






)



