>> Editing a 916mb, 10157 x 15000 px file with 19 layers<< Is this 300ppi or 72ppi? The NVIDIA Quadro P1000 is a good GPU, but ensure that your system is not switching between the NVIDIA GPU and the integrated Intel UHD Graphics 630, as this could lead to performance bottlenecks. Set Photoshop's performance settings to exclusively use the NVIDIA Quadro P1000.
To optimize performance in Photoshop:
Purge Cache: Go to Edit > Purge > All to clear Photoshop's cache, freeing up memory and potentially improving performance.
Adjust Cache Levels: In Photoshop's Performance settings, adjust the Cache Levels. Setting it higher (like 4 or 6) can improve performance with larger files, though it may increase initial load times.
Regarding memory usage, while Photoshop using 80% of available memory is generally good, it can cause slowdowns if the remaining memory is insufficient for other system processes, especially with large files. Photoshop uses scratch disks to store temporary files when it runs out of RAM.
Laptop vs. Desktop Performance: I just offer this as persepctive... If Photoshop needs to use a scratch disk, keep in mind that laptop hard drives are generally slower than desktop hard drives. Laptops typically have slower RPMs (Revolutions Per Minute) and use 2.5-inch drives compared to the 3.5-inch drives in desktops. The smaller size and slower speed can contribute to reduced performance due to smaller platters and lower data density.
With this information we might be able to help make perfromance better or at least set expectations.
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