Nick Craig-Wood schrieb: > Even if 0.0 is allocated and de-allocated 10,000 times in a row, there > would be no memory savings by caching its value. > > However there would be > a) less allocator overhead - allocation objects is relatively expensive > b) better caching of the value > c) less cache thrashing > > I think you'll find that even in the no memory saving case a few > cycles spent on comparison with 0.0 (or maybe a few other values) will > speed up programs.
Can you demonstrate that speedup? It is quite difficult to anticipate the performance impact of a change, in particular if there is no change in computational complexity. Various effects tend to balance out each other. Regards, Martin _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
