Review Request 126818: Cache QX11Info::appRootWindow in eventFilter

[Kai Uwe Broulik]

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+1

Purely unscientific measurement through ksysguard shows that this halves the CPU usage of plasmashell during a file copy operation.

- Kai Uwe Broulik


On Jan. 19, 2016, 11:21 nachm., David Edmundson wrote:
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> https://git.reviewboard.kde.org/r/126818/
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> (Updated Jan. 19, 2016, 11:21 nachm.)
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> Review request for KDE Frameworks.
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> Repository: kwindowsystem
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> Description
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> appRootWindow is (relatively) expensive and won't change.
> nativeEventFilter is called a lot
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> This should speed things up.
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> CCBUG: 356479
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> Diffs
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>   src/platforms/xcb/kwindowsystem.cpp 9d287043c24894ca3c29c439c7939b139da055e8 
>   src/platforms/xcb/kwindowsystem_p_x11.h 3fa82a436d7fe12b50f7e8efd7338faf817f6579 
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> Diff: https://git.reviewboard.kde.org/r/126818/diff/
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> Testing
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> Ran some apps and they seemed to still work.
> Not tested any specific functionality.
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> Thanks,
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> David Edmundson
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