Swing has better performance than AWT. The only problem is Swing draws it's own components which can cause some 'glitching' especially with larger applications that you may have to scroll. In reality, Java's VM is almost the same as the .NET engine, so there really shouldn't be that much of a speed difference. I'd say maybe look some more at your coding..... Are you trying to load a bunch of stuff from a database at RT?

its just a database authentication mdi....