This is separate from 445665. Once the effect is activated, there is a perceptible lag before windows actually start moving It's like 100-200 ms most of the time, but the delay gets worse if the CPU is under heavy load. By contrast, Present Windows always activates instantly for me, irrespective of CPU load.
Will be fixed with https://invent.kde.org/plasma/kwin/-/merge_requests/1686.
Git commit 379ae2d5c258cc6610eec107413e1c3074a32a36 by Vlad Zahorodnii. Committed on 19/11/2021 at 10:52. Pushed by vladz into branch 'master'. effects/overview: Reuse qml loading results between effect activations Currently, every time you launch the overview effect, QtQuick will go out and parse QML files. With the overview effect gaining more features and the code size getting bigger, it takes more time for the overview to present the first frame after it got triggered. With this change, the overview effect will keep the ScreenView QQmlComponent object around that can be used to avoid reparsing qml code every time the overview effect is launched. It also ports the Overview effect from de-facto deprecated qml context to initial properties, which yield slightly better startup times. M +1 -0 src/effects/CMakeLists.txt M +40 -9 src/effects/overview/overvieweffect.cpp M +11 -2 src/effects/overview/overvieweffect.h M +3 -0 src/effects/overview/qml/ScreenView.qml https://invent.kde.org/plasma/kwin/commit/379ae2d5c258cc6610eec107413e1c3074a32a36