我应该使用 def、cdef 或 cpdef 定义我的 Cython 函数以获得最佳性能吗？
Should I define my Cython function using def, cdef, or cpdef for optimal performance?
假设我想要最佳性能，我如何知道在定义 Cython 函数时是使用 def、cdef 还是 cpdef？
如果你想要最佳性能，你应该知道 中提到的相关问题：
Once the function has been called there is no difference in the speed that the code inside a cdef and a def function runs at.
因此，为了获得最佳的 Cython 性能，您应该始终静态键入所有参数和变量，直觉上您会很想使用 cdef，但有一些注意事项我为此构建了下面的流程图（也是基于前面提到的答案）：
此外，请注意：
cpdef functions cause Cython to generate a cdef function (that allows a quick function call from Cython) and a def function (which allows you to call it from Python). Interally the def function just calls the cdef function.
...以及来自 Cython 文档：
This exploits early binding so that cpdef functions may be as fast as possible when using C fundamental types (by using cdef). cpdef functions use dynamic binding when passed Python objects and this might much slower, perhaps as slow as def declared functions.
还有一个 case-specific benchmark（经常从 Python 调用该函数）产生以下结果：
假设我想要最佳性能，我如何知道在定义 Cython 函数时是使用 def、cdef 还是 cpdef？
如果你想要最佳性能，你应该知道
Once the function has been called there is no difference in the speed that the code inside a
cdefand adeffunction runs at.
因此，为了获得最佳的 Cython 性能，您应该始终静态键入所有参数和变量，直觉上您会很想使用 cdef，但有一些注意事项我为此构建了下面的流程图（也是基于前面提到的答案）：
此外，请注意：
cpdeffunctions cause Cython to generate acdeffunction (that allows a quick function call from Cython) and adeffunction (which allows you to call it from Python). Interally thedeffunction just calls thecdeffunction.
...以及来自 Cython 文档：
This exploits early binding so that
cpdeffunctions may be as fast as possible when using C fundamental types (by usingcdef).cpdeffunctions use dynamic binding when passed Python objects and this might much slower, perhaps as slow asdefdeclared functions.
还有一个 case-specific benchmark（经常从 Python 调用该函数）产生以下结果：