On 05/11/2016 06:39 PM, Joe Kington wrote: > > > In python2 it appears that multiprocessing uses pickle protocol 0 which > must cause a big slowdown (a factor of 100) relative to protocol 2, and > uses pickle instead of cPickle. > > > Even on Python 2.x, multiprocessing uses protocol 2, not protocol 0. > The default for the `pickle` module changed, but multiprocessing has > always used a binary pickle protocol to communicate between processes. > Have a look at multiprocessing's forking.py <http://forking.py> in > Python 2.7.
Are you sure? As far as I understood the code, it uses the default protocol 0. The file forking.py no longer exists, also. https://github.com/python/cpython/tree/master/Lib/multiprocessing (see reduction.py and queue.py) http://bugs.python.org/issue23403 _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org https://mail.scipy.org/mailman/listinfo/numpy-discussion
