https://bugs.kde.org/show_bug.cgi?id=433907
--- Comment #6 from darktemp...@basealt.ru --- Created attachment 137078 --> https://bugs.kde.org/attachment.cgi?id=137078&action=edit imagepath.log.xz Patch attached earlier requires boost and private headers of qtbase and qtdeclarative. Log file generated after creating 100 konsole windows and 1 qterminal window, and running patched plasmashell with: LC_ALL=C DEBUGIMAGEPATH=1 DEBUGOBJECTS=1 plasmashell -n --replace After that I expanded konsole group once and replaced plasmashell with instance without debug settings. It looks like there are thousands instances of FrameSvg and SvgPrivate objects exist at same time. To be more precise, this time I got 8541 simultaneous instances of FrameSvg and 10323 instances of SvgPrivate. Most qml stack traces looked like one of following 3 variants: 1) expression for leftPadding (file:///usr/lib64/qt5/qml/org/kde/plasma/components.3/ToolButton.qml:0) expression for implicitWidth (file:///usr/lib64/qt5/qml/org/kde/plasma/components.3/ToolButton.qml:0) onContainsMouseChanged (file:///usr/share/kf5/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:350) 2) expression for visible (file:///usr/lib64/qt5/qml/org/kde/plasma/components.3/private/ButtonContent.qml:0) expression for horizontalAlignment (file:///usr/lib64/qt5/qml/org/kde/plasma/components.3/private/ButtonContent.qml:58) onContainsMouseChanged (file:///usr/share/kf5/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:350) 3) onContainsMouseChanged (file:///usr/share/kf5/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/Task.qml:350) I tried using qt_v4StackTraceForEngine for obtaining qml stack trace, but it always crashed for me since currentStackFrame is NULL: https://code.qt.io/cgit/qt/qtdeclarative.git/tree/src/qml/jsruntime/qv4engine.cpp?h=v5.15.2#n838 It looks like excessive amount of Plasma::Svg and Plasma::FrameSvg instances is created and destroyed each time this scenario happens. It went from 119 instances to 4318 instances of Plasma::FrameSvg and from 176 instances to 5276 instances of SvgPrivate::SvgPrivate when showing grouped tasks, and to 8541 instances of Plasma::FrameSvg and back to 259 instances (for Plasma::Svg it went -> 10323 -> 425 instances) after I tried to scroll it using mouse wheel. I think this has to be optimized somehow. -- You are receiving this mail because: You are watching all bug changes.
