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Bug
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Resolution: Unresolved
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P2: Important
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None
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6.9.2
There is a big regression in delivering input events in Qt Quick. Attached example in callgrind shows:
Qt 5.15.18
==1572525== I refs: 15,930,854,003
Qt 6.9.2
==1572827== I refs: 64,225,641,185
And QQuickItemPrivate::itemToParentTransform() seems to jump out. It is the highest cost function in Qt 5.15.18 also, but in Qt 6 this function is now called many more times for a single event than it used to in Qt 5.
This causes issues with lower end devices where simple mouse moves take 4x as much CPU time as before.
- relates to
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QTBUG-27054 Qt Symbian Components port runs slowly on QNX
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- Closed
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- mentioned in
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