and all this because adventurious user 'goat' reported he had better luck with cin-gg on arm single-board computer under Wayland/Xwayland - namely timeline scrolling performance.
Wow, that is interesting and I really wonder why that would be -- it must be some implementation feature of Wayland ?
I think yes? On most modern systems X server uses 3d acceleration via glamour module, and 3d part on those singleboard computers tend to use even more weird layout for their buffers - so you can't just read texture via cpu (memcpy), it must be detiled, sometimes in software ... and wayland does some of this via dma-bufs (?) kernel level shared buffer implementation .. so it can do things not defined or allowed in Opengl/egl
or so I gathered from forums ....