Unfortunately switching to Qt is not a magic bullet that will give any real performance benefit. In fact, it will most likely do the opposite as the existing code is heavily dependent on Glib/GTK. Gluing on a Qt layer will require either several layers of wrapping or a complete replacement of the Inkscape codebase with some entirely new code.
And, yes, I do speak from experience. Among other things I have shipped commercial Qt-based applications.
Unfortunately switching to Qt is not a magic bullet that will give any real performance benefit. In fact, it will most likely do the opposite as the existing code is heavily dependent on Glib/GTK. Gluing on a Qt layer will require either several layers of wrapping or a complete replacement of the Inkscape codebase with some entirely new code.
And, yes, I do speak from experience. Among other things I have shipped commercial Qt-based applications.