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

[william.crocker at analog.com]

> 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.
> *

Insure that all of your code and
the Qt libs are compiled with optimization.

> 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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