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  1. Qt
  2. QTBUG-1518

QFontEngineMacMulti::stringToCMapInternal slowness

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      Add some sort of caching, this is showing up almost every time I profile something on the Mac:

      Item Views
      QTextEdit
      QWebView
      QPushButton animation

      demos/embeddeddialogs startup time:
      + 37.2% QFontEngineMacMulti::stringToCMapInternal(QChar const*, int, QGlyphLayout*, int*, QFlags<QTextEngine::ShaperFlag>, QFontEngineMacMulti::ShaperItem*) const (QtGui)

      + 37.1% QFontEngineMacMulti::stringToCMap(QChar const*, int, QGlyphLayout*, int*, QFlags<QTextEngine::ShaperFlag>, unsigned short*, HB_CharAttributes const*) const (QtGui)
        + 36.1% QTextEngine::shapeTextWithAtsui(int) const (QtGui)
          + 36.1% QTextEngine::shapeText(int) const (QtGui)
            + 36.1% QTextEngine::shape(int) const (QtGui)
              + 33.9% QTextEngine::width(int, int) const (QtGui)
                + 33.9% QFontMetrics::width(QString const&, int) const (QtGui)
                  + 33.6% QComboBoxPrivate::recomputeSizeHint(QSize&) const (QtGui)
                   
      • 18.3% QComboBox::minimumSizeHint() const (QtGui)
                    + 15.2% QComboBox::sizeHint() const (QtGui)

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            sorvig Morten Sørvig
            sorvig Morten Sørvig
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              Created:
              Updated:
              Resolved:

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