Tkinter Text widget getting too slow

[Jane Austine]

As you add more items, say text lines, in Text widget, it gets too
slow and almost impractical to use on. Take idle for example. If the
text gets bigger(e.g. print
urllib.urlopen('http://www.amazon.com').read() ), it becomes too
sluggish to use as an "interactive" shell.

I have tried wxPython and it seems to have the same problem (from my
experience using PyCrust).

Is there any way to speed up Text widget, or should I look for another
GUI library?

Jane