[Interest] Qt 5.5.1 30% slower than Qt 5.5.1

[maitai]

Sounds a serious issue... 

What OS are you speaking about? QML ou Widget-based application? 

Thanks 

Philippe 

Le 24-10-2015 21:21, Bernd Müller a écrit : 

> Hi there,
> 
> after further testing I'm not sure if its only an graphic issue. Because a basic QWidget / QPainter test application did not show any slow down with Qt 5.5.1. So it might be a deeper issue. 
> 
> All I can say is that my application runs 30% slower with QT 5.5.1 than with Qt 5.5.0. 
> 
> So I downloaded both Qt versions again and made a clean install. And after recompiling the Qt 5.5.0 and Qt 5.5.1 versions of my application both ran slow ! 
> 
> So I checked the files from the new downloaded Qt 5.5.0 an saw that there are new files in it: For instance Qt5Core.dll and Qt5Cored.dll are from 23 October 2015 ! 
> 
> So I went back to the initial QT 5.5.0 release with Qt5Core.dll and Qt5Cored.dll from date 11. August 2015. And the speed was there again ! 
> 
> There is definitely something wrong with the new Qt 5.5.1 release. But I'm not an Qt expert to find out which Qt module does the slow down. 
> 
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