[Development] QApplication startup is a lot slower in Qt5 than Qt4

Thiago Macieira thiago.macieira at intel.com
Sun Aug 11 02:55:31 CEST 2013

On domingo, 11 de agosto de 2013 02:14:47, Jiergir Ogoerg wrote:
> Did anyone notice that
> QApplication app(argc, argv)
> takes on Qt5 about 220ms (warm execution) to execute while on Qt4 only
> about 50-75ms (warm execution)?
> Another person confirmed these results on his computer.
> Can anyone please explain why it happens and if/when it gets fixed?

There have been a few fixes post 5.1.0 to fix that. Please make sure you're 
using 5.1.1 (release branch) or 5.1.2 (stable branch).
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
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