#include <QtGui>

int main(int argc, char **argv)
{
    QApplication a(argc, argv);
    QWidget w;
    for (int i = 0; i < 10000; i++) { 
        QString s = "test"; 
        double dSize = 1.8100000 + (((double)i) / 100000);
        QFont font = QFont("Arial"); 
        font.setPointSizeF(10. + dSize); 
        QRect rectBound = QFontMetrics(font).boundingRect(s); 
    }
    return 0;
}