[Development] Perf about loading one 240x320 png image

[song.7.liu at nokia.com]

Hi,

I am testing the image loading performance in Qt5, that the image with different location (qt resource or file system) and using QImage or QPixmap.

Testing is based on a low end devices, and the result is shared as bellow:

Loading perf (240x320 png image)

from resource

from file system

QImage

1.135s

1.132s

QPixmap

1.146s

1.182s


It seems the performance is really bad,,, does anyone have some insight about which place can be the bottleneck ?

Thanks,
Song
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