[issue14775] Slow unpickling of certain dictionaries in python 2.7 vs python 2.6

[Antoine Pitrou]

Antoine Pitrou <pitrou at 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 streams shouldn't have changed from 2.6 to 2.7.
You can use the pickletools.dis() function to disassemble a pickle stream, and examine whether there are any differences between the various files.

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nosy: +pitrou

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<http://bugs.python.org/issue14775>
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