> Compared to what, did you measure something? As example, instantiation of Model classes in Django (Model.__init__) sends two signals (pre_init and post_init) - they are rarely used in practice - but they make instantiation about two times slower. Yes, I measured that.
The creator of Louie (Patrick K. O'Brien) himself seems to use them only as an option that can be enabled/disabled in his projects (e.g. Schevo) - because they are slow. -- http://mail.python.org/mailman/listinfo/python-list
