如何逐行分析cython功能 [英] How to profile cython functions line-by-line

问题描述

我经常很难在我的 cython 代码中找到瓶颈。如何逐行描述 cython 函数？

I often struggle to find bottlenecks in my cython code. How can I profile cython functions line-by-line?

推荐答案

Robert Bradshaw帮助我获得了Robert Kern的 line_profiler 工具，该工具可用于 cdef 函数，我想我可以在 stackoverflow 。

Robert Bradshaw helped me to get Robert Kern's line_profiler tool working for cdef functions and I thought I'd share the results on stackoverflow.

简而言之，请设置常规的 .pyx 文件，构建脚本并在调用 cythonize 之前添加以下内容。

In short, set up a regular .pyx file and build script and add the following before your call to cythonize.

# Thanks to @tryptofame for proposing an updated snippet
from Cython.Compiler.Options import get_directive_defaults
directive_defaults = get_directive_defaults()

directive_defaults['linetrace'] = True
directive_defaults['binding'] = True

此外，您需要定义C宏 CYTHON_TRACE = 1 通过修改您的扩展名设置，使

Furthermore, you need to define the C macro CYTHON_TRACE=1 by modifying your extensions setup such that

extensions = [
    Extension("test", ["test.pyx"], define_macros=[('CYTHON_TRACE', '1')])
]

使用的工作示例 iPython 笔记本中的%% cython 魔术在这里：
http://nbviewer.ipython.org/gist/tillahoffmann/296501acea231cbdf5e7

A working example using the %%cython magic in the iPython notebook is here: http://nbviewer.ipython.org/gist/tillahoffmann/296501acea231cbdf5e7

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