[issue25159] Regression in time to import a module
Serhiy Storchaka
report at bugs.python.org
Tue Sep 22 23:49:25 CEST 2015
Serhiy Storchaka added the comment:
I just have rebuilt my Python's in development brances after made distclean to avoid possible effects of incremental building, and got the same results.
(1) for i in `seq 5`; do ./python -I -m timeit -n1 -r1 -s "import sys; sys.modules.clear()" -- "import enum"; done
Python 3.4: 29 msec
Python 3.5: 43.4 msec (+50%)
Python 3.6: 44.4 msec (+2%, +53%)
(2) for i in `seq 5`; do ./python -I -m timeit "import enum"; done
Python 3.4: 3.02 usec
Python 3.5: 3.14 usec (+4%)
Python 3.6: 3.34 usec (+6%, +10%)
(3) for i in `seq 5`; do ./python -I -m timeit -n1 -r1 "import enum"; done
Python 3.4: 3.49 msec
Python 3.5: 4.19 msec (+20%)
Python 3.6: 4.45 msec (+6%, +28%)
32-bit Ubuntu 14.04, Linux 3.16, gcc 4.8.4, Intel(R) Atom(TM) CPU N570 @ 1.66GH.
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<http://bugs.python.org/issue25159>
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