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  1. Qt
  2. QTBUG-64999

Poor window resize performance

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Duplicate
    • Affects Version/s: 5.9.3
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      Gentoo Linux x86_64, 4.12.12

      KDE 5.11.4

      nvidia-drivers 387.34

      Description

      Window resizing is extremely slow and consumes a lot of CPU. Half by Qt application itself, half by X11.

      It's not a Qt regression since this bug exists for a long time (starting Qt 5). Qt 4 worked fine, but I don't have one at the moment to test again.

      The resize lags only in Qt applications, not GTK+, so it's not KDE, X, nvidia bug. Event through that X11 consumes a lot of CPU too and according to profiling it's because of nvidia. GTK+ windows in GNOME works perfectly smooth.

       

      More details: https://bugs.freedesktop.org/show_bug.cgi?id=103362

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              • Assignee:
                Unassigned
                Reporter:
                razrfalcon Evgeniy
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                • Created:
                  Updated:
                  Resolved:

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