n-body problem at shootout.alioth.debian.org

[Peter Maas]

Giovanni Bajo wrote: [...]

Anyway, this is a bug on its own I believe. I don't think new-style
classes are meant to be 25% slower than old-style classes. Can any guru
clarify this?

Please try 2.5 - there's been significant optimisation work put into 2.5

I checked that:

10000 runs of nbody.py, time in sec

| classic | new-style | n/c
-----------+---------+-----------+----------
python 2.4 | 2.33 s | 2.89 s | 1.24
python 2.5 | 2.06 s | 2.61 s | 1.27
2.4/2.5 | 1.13 | 1.11 | -

You are right, 2.5 is better than 2.4. But the runtime penalty
for using new-style classes remains.

 

[Peter Maas]

10000 runs of nbody.py, time in sec

Correction: 10000 iterations of advance().