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  1. Qt
  2. QTBUG-46916

QT Library very slow on Windows Compact Embedded 7 (WEC7) platforms.

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • None
    • 4.8.x, 5.5.0 RC
    • Core: Other
    • None

    Description

      With latest updates of WEC7, the function qt_wince_is_platform() present in src\gui\kernel\qguifunctions_wince.cpp is causing a heavy degradation of performance by slowing down all UI operations.

      The cause is the call of SystemParametersInfo() with a deprecated funcionality: instead of calling SystemParametersInfo(SPI_GETPLATFORMTYPE, .... if you changed the code with call SystemParametersInfo(SPI_GETPLATFORMNAME, ... the funcionality is the same but the degradation will disappears!

      The problem is present also in the Qt 5.x tree.

      Attachments

        1. qguifunctions_wince.cpp
          12 kB
          Alessandro Ribolzi
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            bjoern.breitmeyer Björn Breitmeyer
            RaR Alessandro Ribolzi
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            Dates

              Created:
              Updated:
              Resolved:

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