Is there a performance advantage/disadvantage using Qt compiled with glib support? From the Trolltech docs:

"To enable closer integration with the GNOME deskop environment and tools, Qt 4.2 now contains support for the Glib eventloop. This makes it possible for Qt applications to use plugins made using other Glib-based frameworks, and even enables Qt plugins to be created for use with non-Qt applications."

I really don't care about closer integration with GNOME - I would like to develop pure Qt applications and would like a highly optimized Qt.

Also, Glib has been ported natively to Windows (using mingw) and to Mac OS X as well. Is there a reason why Trolltech only decided to add glib support to X11/Unix versions?