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Type: Bug
Resolution: Duplicate
Priority: P1: Critical
Fix Version/s: 6.10
Affects Version/s: 6.10.0 Beta4
Component/s: QML: Declarative and Javascript Engine, Quick: Core Declarative QML
Labels:
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compare: https://testresults.qt.io/grafana/d/5ei7yHViz/qmlbench-daily-results?orgId=1&from=2024-08-31T22:00:00.000Z&to=2025-08-31T22:00:00.000Z&timezone=browser&var-suite=$__all&var-benchmark=multiview.qml&var-benchmark=modelaccess_size.qml&var-benchmark=modelaccess_rect.qml&var-benchmark=modelaccess_point.qml&var-benchmark=modelaccess_datetime.qml&var-benchmark=modelaccess_color.qml&var-benchmark=delegates_tumbler.qml&var-benchmark=delegates_textfield.qml&var-benchmark=delegates_textarea.qml&var-benchmark=delegates_switch.qml&var-benchmark=delegates_spinbox.qml&var-benchmark=delegates_slider.qml&var-benchmark=delegates_scrollview.qml&var-benchmark=delegates_scrollbar.qml&var-benchmark=delegates_rowlayout.qml&var-benchmark=delegates_qobject.qml&var-benchmark=delegates_menuitem.qml&var-benchmark=delegates_menu_custom.qml&var-benchmark=delegates_itemdelegate.qml&var-benchmark=delegates_item_childrenRect.qml&var-benchmark=date_getYear.qml&var-branch=dev&var-branch=6.9&var-hardwareId=Ubuntu_22.04_Foucault_x64&var-CoV=hide&var-graphicsApi=opengl

We see that in many benchmarks Qt 6.9 is faster than Qt 6.10. That means something must have regressed.

duplicates

QTBUG-140339 Performance regression on multiple benchmarks

Reported

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Assignee:: Qt Qml Team User

Reporter:: Ulf Hermann

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Created:: 19 Sep '25 09:51

Updated:: 19 Sep '25 11:41

Resolved:: 19 Sep '25 11:41

There are no open Gerrit changes