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  1. Qt
  2. QTBUG-104785

[REGR:5->6] Performance regression in QLocale on macOS

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Details

    • macOS
    • 21
    • d3ede38ed (dev), 62c7b68ac (tqtc/lts-6.2), 59c686080 (dev), ecfb048b4 (6.5), 77bdb9dfb (6.5)
    • Foundation PM Prioritized, Foundation Sprint 76, Foundation Sprint 77, Foundation Sprint 78, Foundations Sprint 79

    Description

      On macOS with qt6 there is a performance regression in the method QLocale::toString(QDate).

      macOS qt5: 0.000762 msecs per iteration
      macOS qt6:  0.32 msecs per iteration

      Test code is (see also attached project):

      QLocale locale = QLocale::system();    
QDate curDate = QDate::currentDate();    
QBENCHMARK(locale.toString(curDate, "dd.MM.yyyy"));

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-116642 Provide a refresh mechanism for system locale data

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-109201 toString() in macOS' system locale is very slow

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open
          For Gerrit Dashboard: QTBUG-104785
          # Subject Branch Project Status CR V
          476184,7 Darwin: Cache system locale's zero digit and invalidate on locale changes dev qt/qtbase Status: MERGED +2 0
          476229,4 Darwin: Disable QMacAutoReleasePool tracker in release builds dev qt/qtbase Status: MERGED +2 0
          477142,4 Darwin: Cache system locale's zero digit and invalidate on locale changes tqtc/lts-6.2 qt/tqtc-qtbase Status: MERGED +2 0
          477931,2 Darwin: Disable QMacAutoReleasePool tracker in release builds 6.5 qt/qtbase Status: MERGED +2 0
          478798,2 Darwin: Cache system locale's zero digit and invalidate on locale changes 6.5 qt/qtbase Status: MERGED +2 0

          Activity

            People

              vestbo Tor Arne Vestbø
              lsbts1291 Lorenzo Sinigaglia
              Vladimir Minenko Vladimir Minenko
              Alex Blasche Alex Blasche
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              Dates

                Created:
                Updated:
                Resolved: