[Qt-interest] Poor performance of "setBackground()" API in QTableWidgetItem class in Qt 4.5.1

[Mark Pereira]

Hi,

I have been using Qt 4.3.3 for a while and have recently moved to 
Qt4.5.1. I have noticed that the performance of the "setBackground()" 
API of QTableWidgetItem class has slowed down dramatically.

I have attached a sample piece of code which can be used to reproduce 
this problem. In Qt 4.3.3. it takes around 407msec to complete setting 
the background, while in Qt 4.5.1 it takes 68,567msec for the same task. 
I ran this test on a Intel Core Duo PC (1.8 GHz) with 2 GB RAM.

Any suggestions as to how to improve this performance.

Thanks,
Mark


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