When I run Libreoffice on, and scroll rapidly back and forth, the performance rapidly drop. Basically, I use two-finger scroll on the touchpad, and rapidly move the fingers back and forth between the bottom and top of the touchpad. The longer I keep doing it, the lower the framerate gets, and if I keep doing it for a while the framerate drops so low that the window is marked as unresponsive. The performance then returns to normal if I stop scrolling for a few seconds. It's easiest to reproduce in Calc, but it happens in other components as well, such as long Writer documents.
Steps to Reproduce:
1. Open Calc on Plasma Wayland
2. Start scrolling rapidly back and forth
Performance drops severely
Performance stays as normal
User Profile Reset: Yes
Operating System: openSUSE Tumbleweed 20230113
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.8
Kernel Version: 6.1.4-1-default (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx
Memory: 29.3 Gibyte of RAM
Graphics Processor: AMD Radeon Vega 10 Graphics
Product Name: Aspire A315-41
System Version: V1.18
Do you use some scaling or High DPI setting for your OS/DE display settings?
Please also paste here the info copied from Help > About LibreOffice.
Version: 126.96.36.199 / LibreOffice Community
Build ID: 40(Build:2)
CPU threads: 8; OS: Linux 6.1; UI render: default; VCL: kf5 (cairo+wayland)
Locale: sv-SE (sv_SE.UTF-8); UI: sv-SE
I can reproduce the issue regardless of whether scaling is enabled or disabled.
Build ID: 40(Build:2)
CPU threads: 12; OS: Linux 6.2; UI render: default; VCL: kf5 (cairo+wayland)
Locale: fr-FR (fr_FR.UTF-8); UI: fr-FR
I can also reproduce this bug in writer and it is very annoying as the larger the documents gets, the more laggy the scroll becomes.
(In reply to linus.kardell from comment #2)
> Version: 188.8.131.52 / LibreOffice Community
> Build ID: 40(Build:2)
> CPU threads: 8; OS: Linux 6.1; UI render: default; VCL: kf5 (cairo+wayland)
> Locale: sv-SE (sv_SE.UTF-8); UI: sv-SE
> Calc: threaded
> I can reproduce the issue regardless of whether scaling is enabled or
I can reproduce this, as well. It's especially worse at larger resolutions.
(In reply to jake.m.knepper from comment #4)
> I can reproduce this, as well. It's especially worse at larger resolutions.
Jake, can you please also paste here the information copied from Help > About LibreOffice?
All: did this start in version 7.4? Are you able to test earlier versions to let us know if this is a regression?