Plasmashell and kwin_x11 consume a lot of CPU if multiple expiring notices are visible at the same time. STEPS TO REPRODUCE 1. In a konsole bash shell execute many 20-second notifications: for i in 1 2 3 4 5 6 7 8 9 10; do notify-send --expire-time 20000 test $i;done OBSERVED RESULT Unresponsive/jerky desktop. High CPU usage. Window dragging is very jerky. Performance returns to normal as notices expire. EXPECTED RESULT No substantial effect on desktop responsiveness or CPU consumption. SOFTWARE/OS VERSIONS Linux/KDE Plasma: OpenSUSE Tumbleweed 20211005 (available in About System) KDE Plasma Version: 5.22.5 KDE Frameworks Version: 5.15.2 Qt Version: 5.15.2 ADDITIONAL INFORMATION Processors: 6 x AMD-6300 Memory: 15.5 GiB Graphics Processor: NVIDIA GeForce GTX 1650 SUPER with proprietary driver.
*** This bug has been marked as a duplicate of bug 414785 ***