For the last year and with the latest updates I’ve experienced an awful behavior with both Photoshop and Lightroom. Both programs are extremely slow. I experimented with performance settings on both programs (enabling/disabling GPU, memory increase, etc.) but had no effect. This is the most laggy and slow experience I have ever had with those programs. I am thinking of suspending my subscription to Adobe, because I am almost unable to work with this software.
Panels are laggy. When switching across modules, sometimes the panels can’t load for a several second or freeze. All operation in Lightroom, like filtering images, browsing images, switching between modules and panels, are very slow. Luckily the sliders in Develop mode are working well.
Brush is insanely slow. When I draw with a big brush, it can take half a minute just to draw from one side to the other of the canvas. Opening files, switching between open canvases, or even closing files and closing Photoshop itself is very slow. When I open an image from Lightroom to Photoshop it sometimes takes up to 15 seconds to perform this action.
All those actions are performed under a PC in good health and Windows with the latest updates and I confirmed that no background tasks are running that could consume resources or slow work.