On 2018-07-30 13:11, INADA Naoki wrote:

Like previous SageMath bench, this is caused by Cython's specialization; __Pyx_PyObject_CallOneArg.

It specializing calling PyFunction and PyCFunction, but it doesn't specialized for calling CyFunction.

Yes, I saw that too. But this is exactly what CPython does (it optimizes PyFunction and PyCFunction but not CyFunction), so I would still argue that the benchmark is fair.