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python Programming Glossary: arr_3dWhy is numpy's einsum faster than numpy's built in functions? http://stackoverflow.com/questions/18365073/why-is-numpys-einsum-faster-than-numpys-built-in-functions arr_2D np.arange 500 2 dtype np.double .reshape 500 500 arr_3D np.arange 500 3 dtype np.double .reshape 500 500 500 First lets.. 500 First lets look at the np.sum function np.all np.sum arr_3D np.einsum 'ijk ' arr_3D True timeit np.sum arr_3D 10 loops best.. the np.sum function np.all np.sum arr_3D np.einsum 'ijk ' arr_3D True timeit np.sum arr_3D 10 loops best of 3 142 ms per loop..
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