Priority: P3: Somewhat important
Affects Version/s: 6.0.0
Fix Version/s: None
Environment:OS: Arch Linux
DE: Plasma 5.20.4
WM : kwin_wayland (also tested with sway and getting same results)
CPU: Intel i7-8565U
GPU: Intel UHD Graphics 620
I have installed qt6-base qt6-declarative qt6-wayland qt6-quickcontrols2
from archlinux's repositories via pacman.
I have created new project using QtCreator with `Qt Quick Application - Scroll` template.
When I run it with `QSG_RHI_BACKEND=vulkan` and `QT_QPA_PLATFORM=wayland` it's performance is really slow.
It runs fine with rhi vulkan+xwayland, rhi vulkan+xorg, rhi opengl+wayland, rhi opengl+xwayland and rhi opengl+xorg but rhi vulkan+wayland's performance is really slow when scrolling the list.
scrolling list using scrollbar does not affect performance. it only happens when scrolled using mouse wheel/touch pad and placing mouse pointer in middle of listview as delegate under mouse pointer is highlighted