Pythran 作为 Numpy 后端

Using the flag --np-pythran , it is possible to use the Pythran numpy implementation for numpy related operations. One advantage to use this backend is that the Pythran implementation uses C++ expression templates to save memory transfers and can benefit from SIMD instructions of modern CPU.

This can lead to really interesting speedup in some cases, going from 2 up to 16, depending on the targeted CPU architecture and the original algorithm.

Please note that this feature is experimental.

distutils 的用法范例

You first need to install Pythran. See its 文档编制 了解更多信息。

Then, simply add a cython: np_pythran=True directive at the top of the Python files that needs to be compiled using Pythran numpy support.

Here is an example of a simple file using distutils:

from distutils.core import setup
from Cython.Build import cythonize
    name = "My hello app",
    ext_modules = cythonize('hello_pythran.pyx')

Then, with the following header in hello_pythran.pyx :

# cython: np_pythran=True

hello_pythran.pyx will be compiled using Pythran numpy support.

Please note that Pythran can further be tweaked by adding settings in the $HOME/.pythranrc file. For instance, this can be used to enable Boost.SIMD support. See the Pythran user manual 了解更多信息。



Cython 用于 NumPy 用户


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