Adding Recolour layers (on Mac) makes app very laggy

[Cartoonjosh]

Every time I use the Recolour layer AP becomes extremely laggy. The brush strokes update very slowly, so much that it's impossible to see where I'm colouring. The image I'm working is not very large (4000 x 4000 at 72 dpi) but almost every operation  (like choosing a menu or a brush) will make AP stall.  I'm using an M1 Max Mac Book Pro. I just updated to MacOS Monterey 12.6 but I noticed this behaviour prior to the update. 

[v_kyr]

See & try out ...

• Stalling & Lagging in Affinity Photo with M1 MacBook Pro / Apple Silicon? Check this fix out...
• [KNOWN ISSUE] Affinity apps have performance issues on macOS Monterey
• Further check if switching under the APh hardware performance options (preferences) from Metal to OpenGL changes anything here ...
   

  Quote

  Performance options RAM Usage Limit—allows you to set your preference for optimizing application performance for your projects. Disk Usage Warning At—choose the limit at which you are warned about disk usage. Undo Limit—choose the history length you are able to access. View Quality—choose the way in which the image displays during modifications. Select from the pop-up menu. Choose whether to dither gradients, when working on projects, to speed up performance. Choose a clipping option for optimizing performance. File Recovery Interval—sets the interval for saving temporary data for currently open documents, allowing a document restore to be offered at startup if the app develops a fault. Display—if your Mac has an additional discrete graphics card, checking the Use only integrated GPU will not allow access to it, therefore reducing power consumption and conserving battery life (useful for unplugged MacBook Pros). Retina Rendering—choose your rendering experience. Select from the pop-up menu.

  • Automatic (Best)—renders as non-retina followed by retina for balanced performance and quality.
  • Low quality (Fastest)—renders as non-retina only for highest performance level but compromises on quality.
  • High quality (Slowest)—renders as retina only for high quality but may compromise performance.

  Hardware Acceleration—checking Enable Metal compute acceleration boosts some tasks' performance if a compatible GPU is available. See the Hardware acceleration topic.

• Hardware acceleration