- All (478)
- jom (0)
- Qt Linguist (7)
- Qt Eclipse Integration (9)
- Qt Designer (7)
- Qt Creator (4)
- Qt build system: qmake (31)
- Qt build system: configure (3)
- Qt Assistant (5)
- Printing (4)
- Porting from Qt 3 to Qt 4 (1)
- Plugins (7)
- Qt Visual Studio AddIn (2)
- Qt/MFC Migration (2)
- QtScript (3)
- MDI (2)
- XML (1)
- Widgets (22)
- WebKit (5)
- Tools and Containers (2)
- Threads (2)
- Text Handling (10)
- SQL (6)
- QtTest (1)
- QtService (1)
- Platform: Windows (49)
- Platform: Unix (16)
- Platform: Mac OS X (18)
- Image Formats (2)
- I/O (2)
- Graphicsview (8)
- Font handling (9)
- Event System (18)
- Drag and Drop (4)
- Dialogs (6)
- Desktop integration (3)
- ActiveQt (3)
- Itemviews (60)
- Layout (4)
- Qt Quick (10)
- Qt SDK (1)
- Licensing (2)
- Platform: Embedded Linux (38)
- Painting (32)
- OpenGL (4)
- Object Model (6)
- Network (5)
- Multimedia (3)
- Miscellanous (23)
- Main Window (19)
- Look and Feel (23)
- Development (0)
- Getting Involved (0)
- Routines (0)
Why is the debug version of my application so slow?
This is due to the fact that Microsoft Visual C++ .NET’s debug version of the runtime libraries are slow, and by default Qt will link against the debug version of the runtime library if you configure Qt in debug mode. There is a workaround for this, simply do the following:
- Edit your qt\mkspecs\win32-msvc.net[2003/2005/2008]\qmake.conf file
- Where it states -MDd change it to be -MD
- Go into your qt directory
- nmake distclean
- Do configure -redo
- nmake
Then all that is left is to regenerate the Makefile for your application and rebuild it.
2 comments
September 7, 2010
Lab Rat
Will it cause any type of problem in debugging the application?
September 22, 2010
Hobby Entomologist
It doesn’t cause any problems with debugging the app itself, it just means you can’t debug into the C runtimes.