https://bugs.kde.org/show_bug.cgi?id=500402
Bug ID: 500402
Summary: Excess CPU usage from png_read_image
Classification: Plasma
Product: kwin
Version: 6.3.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: seria.warty...@icloud.com
Target Milestone: ---
Created attachment 178584
--> https://bugs.kde.org/attachment.cgi?id=178584&action=edit
sysprof screenshot
SUMMARY
I noticed excess cpu usage from png_read_image when benchmarking
maximize-unmaximize scenario, related to SVG rendering.
This png loading can likely be cached.
I am not sure if it's related to the cursor or the window decoration drawing
app icon.
The tested app was Discord with ozone Wayland.
STEPS TO REPRODUCE
1. Maximize the window by dragging to the top and then back to unmaximize
2. Repeat several times
3. Observe sysprof results
OBSERVED RESULT
EXPECTED RESULT
SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Fedora 41 AMDGPU
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
ADDITIONAL INFORMATION
attached sysprof screenshot
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