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Fri Oct 11 14:24:29 CEST 2013 · https://mail.python.org/pipermail/python-dev/2013-October/129388.html

Hi,

recently there has been some talk about reducing import times. It seems
that the current import strategy for C extensions (i.e. importing the
extension at the bottom of the .py file) is quite slow:

====================

import sys

for i in range(10000):
    import decimal
    del sys.modules('decimal')
    del sys.modules('_decimal')

====================

With the regular decimal.py the script is about 9 times slower than running
it with a modified decimal.py that just contains "from _decimal import *".

I don't know enough about the import mechanism to say whether this is
a particularly good benchmark. If it is, perhaps we should devise another
strategy for loading C extensions.

Stefan Krah 

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[Python-Dev] C extension import time