[frameworks-plasma] [Bug 433907] plasmashell works slow when displaying textual list of grouped tasks for big group

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=433907

--- Comment #4 from darktemp...@basealt.ru ---
I've made following debug changes and rebuilt plasma-desktop locally:

diff --git
a/plasma-desktop/applets/taskmanager/package/contents/ui/GroupDialog.qml
b/plasma-desktop/applets/taskmanager/package/contents/ui/GroupDialog.qml
index 802511a08..7706bfaac 100644
--- a/plasma-desktop/applets/taskmanager/package/contents/ui/GroupDialog.qml
+++ b/plasma-desktop/applets/taskmanager/package/contents/ui/GroupDialog.qml
@@ -251,6 +251,9 @@ PlasmaCore.Dialog {
     }

     function updateSize() {
+        console.count("updateSize() called");
+        console.log("updateSize called. visible is ", visible, ", visualParent
is ", visualParent);
+
         if (!visible) {
             return;
         }

I also enabled logging:

$ cat .config/QtProject/qtlogging.ini 
[Rules]
*.debug=true
qt.*.debug=false

and reproduced issue. I've opened grouped task list twice. Here's resulting
part of log:

trying to show an empty dialog
trying to show an empty dialog
updateSize() called: 1
qml: updateSize called. visible is  true , visualParent is 
Task_QMLTYPE_395(0x55e846c480e0)
trying to show an empty dialog
updateSize() called: 2
qml: updateSize called. visible is  true , visualParent is 
Task_QMLTYPE_395(0x55e846c480e0)

It doesn't look like updateSize is called too often. It's called only once each
time grouped tasks list is expanded.

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