I ran a speed test with bcc32, msvc.net and mingw. And here are the results: qt-4/src: bcc32 5.6.4: 00:10:02 msvc 14.00 : 00:23:59 mingw 3.4.2: 01:10:35 qt-4/tools: bcc32 5.6.4: 00:06:59 msvc 14.00 : 00:09:49 mingw 3.4.2: 00:31:28 Andreas