为整个程序启用Cython分析？

Question

The Cython docs say "Profiling in Cython is controlled by a compiler directive. It can be set either for an entire file or on a per function basis via a Cython decorator."

Is there any easy way to enable Cython profiling for an entire Python program? That is, is there a way for me to not have to go through and add # cython: profile=True to dozens of files each time I want to turn profiling on and off?

Answer 1

I believe you can set the directives globally by passing an option on the command line to cython . It is described in the "Compilation" section of the documentation under "How to set directives" ( http://docs.cython.org/src/reference/compilation.html#how-to-set-directives ).

One can also pass a directive on the command line by using the -X switch:

$ cython -X boundscheck=True ...

Directives passed on the command line will override directives set in header comments.

If you are compiling through distutils ( setup.py ) and using the cythonize function, it appears that you can add the option compiler_directives , a dictionary that maps directive names to the corresponding value. I have not found documentation for this feature, but it appears to be how the cython program invokes the cythonize function ( https://github.com/cython/cython/blob/master/Cython/Build/Cythonize.py#L83 ).

For example

from distutils.core import setup
from Cython.Build import cythonize

setup(
    name = "My hello app",
    ext_modules = cythonize("src/*.pyx",
                            compiler_directives={'profile': True})
)