Re: Emacs GTK scroll-bar flickering

[Richard Stallman]

    I don't know, it seems to just be the scrollbar; again, the standard
    themes seem OK (so I don't think this is a critical problem), there's
    just something very slow about my theme.  Menus are very slow too, when
    I use them.

If you run under GDB and arrange to stop it while it's doing this work,
after a few backtraces you could see what's taking the time.