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I usually use a lot of Dust/Median from noise tabs and Gaussian blur.
I don't remember how slow it was when I used Surface blur a few years ago, but I found it slow while trying something new now.
It's less slow if you just apply a filter without using a smart object, but it's not as fast as other filters.
I don't know if you need to set up my Photoshop function, but I'll write it down below.
History : 80
Cache Level : 4
Cache Tile Size : 1024K
Memory : 80%
Scaracth Disk : 250Gb SSD Full Storage for only photoshop scrach disk
Use Graphic processor : check 1060
drawing mode : advanced
Check : Use Graphics Processor to Accelerate Computation
Use Open CL
UnCheck : 30bit display
What i have to do? I don't know what the problem is.
What are the Pixel dimensions, bit depth, color mode, … of the image?
every image is diffrent, but the almost same loading time.
mostly 3000x4000 px , 8 or 16bit, Srgb
It seems the Filter does not utilize the GPU
so I guess you are stuck with trying to improve general perfomance:
For example I personally fund 80 History Steps to be quite a lot …