Multi line labels slow without fontconfig enabled

Steps to reproduce / test case
./configure -no-fontconfig -release -commercial -platform solaris-cc-64

Test app:

#include <QtGui> 
#include <QTimer> 

int main(int argc, char* argv[]) 
{ 
QApplication app(argc, argv); 
QLabel* l; 
if(argc>1) { 
l = new QLabel("This is a test with \n the newline char "); 
} 
else { 
l = new QLabel("This is a test without the newline char "); 
} 
l->show(); 
//QTimer::singleShot(0, &app, SLOT(quit())); 
return app.exec(); 
} 

More information
The single line label appears immediately, the multi line version use about 8 seconds to appear. The commented out QTimer statement was used be able to use a performance tool to see where time was spent. Picture from the performace tool attached.

This is only an issue if configure option -no-fontconfig is used.