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  1. Qt
  2. QTBUG-59360

qt_getCanonicalFontNames takes a huge amount of time

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    • 835c3e94f6089751421a19008d442faec9649ed8 (qt/qtbase/5.12)

    Description

      Text {
    text: "foobar"
}

      Profiling this code on Windows shows that qt_getCanonicalFontNames takes about 60% of the total execution time. Specifically, 48% was spent in GetFontData. This appears to be the single biggest regression for QML compared to 5.6.

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          depends on

          User Story - Created by Jira Software - do not edit or delete. Issue type for a user story. QTBUG-74917 Create a QWindowsDirectWriteFontDatabase

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-74729 QQuickView window creation hangs UI thread for 200-500ms due to loading fallback font families

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-69326 Qt Quick Text performance creation

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-71737 Font family fallback cache results in startup lag on Windows

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          is required for

          Task - A task that needs to be done. QTBUG-74860 Umbrella task for font selection issues

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • In Progress
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-71737 Font family fallback cache results in startup lag on Windows

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              allan.jensen Allan Sandfeld Jensen
              erikv Erik Verbruggen
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              Dates

                Created:
                Updated:
                Resolved:

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