Filing this as a bug because currently Photoshop is unbelievably laggy in this scenario, when historically (especially in pre-cloud days) it used to perform much better.
I'm on Windows 11 Pro, on a laptop with an i7 processor, 32gb memory and discrete graphics card, my disk is less than half-full and I've set PS to use 80% of available RAM. PS version is 25.11.0 20240716.r.706 b326a7d x64.
Editing a 916mb, 10157 x 15000 px file with 19 layers, PS is slow to respond with basic tasks like moving around the file at a high zoom level and transforming layers. Sometimes when using the hand tool to move around, colored artifacts appear on parts of the file. The tool keyboard shortcuts don't always work on first keypress, or they seem to work but then don't (e.g. with clone selected, pressing move tool shortcut shows the cursor changing to move tool, only to revert on first click).
This is particularly disappointing because I've been using PS to create large-scale photomontages for many years now, and 10 years ago, with CS6 (iirc) and a laptop with less than half the memory of this one it worked much better. Some of the photomontages I did back in the day had something like 80 layers. I mainly chose to use PS because it performed well with this type of work, unlike e.g. Gimp.
Could you please dedicate some effort to fixing performance. I have no need for things like generative AI tools. I just want a professional photo editing program with a variety of tools to efficiently select, cut, paste, paint and transform layers, that isn't put to shame by its 12 year old predecessor.
Thanks,
Isabel.