Review Request 126818: Cache QX11Info::appRootWindow in eventFilter

[David Edmundson]

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Review request for KDE Frameworks.


Repository: kwindowsystem


Description
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appRootWindow is (relatively) expensive and won't change.
nativeEventFilter is called a lot

This should speed things up.

CCBUG: 356479


Diffs
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  src/platforms/xcb/kwindowsystem.cpp 9d287043c24894ca3c29c439c7939b139da055e8 
  src/platforms/xcb/kwindowsystem_p_x11.h 3fa82a436d7fe12b50f7e8efd7338faf817f6579 

Diff: https://git.reviewboard.kde.org/r/126818/diff/


Testing
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Ran some apps and they seemed to still work.
Not tested any specific functionality.


Thanks,

David Edmundson

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