[Qt-interest] Qt-4.2.2- CPU loading issues

[ARUN_KUMAR at denso-diam.com]

Hi All,

I am working with Qt-4.2.2 for my project. I am using stacked widgets in 
my project, where each screen has some data widgets (like labels, 
tableWidgets etc) to display. 
As I am experiencing some CPU loading issues for my Qt project. I have 
done profiling to it and I have seen Qt is spending most of the time in 
blit_16_to_16 function. 

Profiling Output:

CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
samples      %               symbol name
5655        15.6818         blit_16_to_16(blit_data const*)
1476        4.0931           qt_intersect_spans(QClipData const*, int*, 
QT_FT_Span_ const*, QT_FT_Span_ const*, QT_FT_Span_**, int)
1418        3.9322           blend_color_rgb16(int, QT_FT_Span_ const*, 
void*)
797          2.2101           QWidgetPrivate::sub 
tractOpaqueChildren(QRegion&, QRegion const&, QPoint const&, int) const
650          1.8025           miRegionOp(QRegionPrivate&, QRegionPrivate 
const*, QRegionPrivate const*, void (*)(QRegionPrivate&, QRect const*, 
QRect const*, QRect const*, 
                                     QRect const*, int, int), void 
(*)(QRegionPrivate&, QRect const*, QRect const*, int, int), void 
(*)(QRegionPrivate&, QRect const*, QRect const*, int, int))

So my question is, is it normal for Qt to spend 15% of its time in 
blit_16_to_16 function? 
Or do i need to focus on some thing else, please give me some addvice on 
this.

Thanks & Regards,
Arun. 

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