SUMMARY: kwin_wayland uses a lot of CPU when the chat on Twitch is full of messages or emotes. Also, the webpage lags a lot until the chat is disabled. STEPS TO REPRODUCE 1. Open a Twitch channel that is full of users using the chat. This happens with Chromium-based browsers and with Firefox. 2. kwin_wayland uses a lot of CPU and the web page lags 3. the chat can be closed, performance restored a bit (doesn't lag anymore, still a lot of CPU usage) opensuse Slowroll, updated. Nvidia drivers 550, external monitor (USB C to DisplayPort), Wayland session.
> Nvidia drivers 550, external monitor Multi GPU copies are known to be very slow and inefficient on NVidia. On the latest KWin + NVidia drivers, there should at least not be a lot of CPU usage though; do you still see that in Plasma 6.4?
(In reply to Zamundaaa from comment #1) > > Nvidia drivers 550, external monitor > Multi GPU copies are known to be very slow and inefficient on NVidia. > On the latest KWin + NVidia drivers, there should at least not be a lot of > CPU usage though; do you still see that in Plasma 6.4? It's going better on updated Aurora OS (Plasma 6.4.x) with latest stable Nvidia drivers.
Cool