STINNER Victor added the comment: Importing a module looks slow to me. Importing a module which is a an *empty* .py file takes ~160 us.
$ python3 -I -m timeit -s "open('slow.py', 'wb').close(); import sys; import slow" "del sys.modules['slow']; import slow" 10000 loops, best of 3: 156 usec per loop The difference betwen Python 3.4 and 3.5 is that enum.py imports indirectly more modules. The following two imports were added to types.py in Python 3.5: import functools as _functools import collections.abc as _collections_abc ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25159> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com