stw sil...@googlemail.com added the comment:
Thanks for the nod to the pickletools module. The structure of the streams do
change between python 2.6 and 2.7, at least for files created with cPickle. You
can see this from the file sizes that I quoted in my previous post. Below are
some
stw sil...@googlemail.com added the comment:
One other thing - python 2.7 added the is_tracked function to the gc module. As
I understand it (from issue #4074) tuples of atomic types are supposed to be
untracked. However, in python 2.7:
gc.is_tracked((1, 2))
True
gc.is_tracked(hello)
True
Antoine Pitrou pit...@free.fr added the comment:
As I understand it (from issue #4074) tuples of atomic types are supposed to
be untracked.
Actually, it is done lazily:
t = 1,2
gc.is_tracked(t)
True
gc.collect()
0
gc.is_tracked(t)
False
--
New submission from stw sil...@googlemail.com:
I've found that unpickling a certain kind of dictionary is substantially slower
in python 2.7 compared to python 2.6. The dictionary has keys that are tuples
of strings - a 1-tuple is enough to see the effect. The problem seems to be
caused by
Changes by stw sil...@googlemail.com:
Added file: http://bugs.python.org/file25525/load_file.py
___
Python tracker rep...@bugs.python.org
http://bugs.python.org/issue14775
___
Antoine Pitrou pit...@free.fr added the comment:
When pickle is used to pickle the data, there is a significant slowdown
Both pickle and cPickle show a slowdown when data pickled in python 2.6 is
unpickled in python 2.7:
This sounds rather weird. Presumably the structure of the pickle
