The net result of the 3.0 generalizations is that Python 3.0 runs the pystone benchmark around 10% slower than Python 2.5. Most likely the biggest cause is the removal of special-casing for small integers. 以前は33%ぐらい遅かったはずなので…

Python 3.1a0 (py3k:67517, Dec 4 2008, 22:33:17) [GCC 4.0.1 (Apple Inc. build 5484)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> l = [n for n in range(5)] >>> l [0, 1, 2, 3, 4] >>> l.__class__ >>> s …