On Oct 29, 11:35 pm, Steven Bethard <[EMAIL PROTECTED]> wrote: > Fuzzyman wrote: > > On Oct 22, 6:43 pm, Steven Bethard <[EMAIL PROTECTED]> wrote: > >> # Inherit from object. There's no reason to create old-style classes. > > > We recently had to change an object pipeline from new style classes to > > old style. A lot of these objects were being created and the *extra > > overhead* of new style classes was killing us. :-) > > I'm curious. Was it memory or speed overhead that was the problem?
It was speed overhead - I have to add a disclaimer that this is IronPython, but my understanding is that the situation is similar with CPython. Creating new style class instances is slower than for old style classes. This was in the execution of spreadsheets, where we had a pipeline of three objects for each spreadsheet element (not sure if the implementation is still the same now). Michael http://www.manning.com/foord > > Steve -- http://mail.python.org/mailman/listinfo/python-list
