c_sort.py

"""
list.sort is interesting in that it calls a C function, that calls back to a
Python function. In an ideal world, we'd be able to record the time inside the
Python function _inside_ list.sort, but it's not possible currently, due to
the way that Python records frame objects.

Perhaps one day we could add some functionality to pyinstrument_cext to keep
a parallel stack containing both C and Python frames. But for now, this is
fine.
"""
import sys
import time

import numpy as np

arr = np.random.randint(0, 10, 10)

# def print_profiler(frame, event, arg):
#     if event.startswith('c_'):
#         print(event, arg, getattr(arg, '__qualname__', arg.__name__), arg.__module__)
#     else:
#         print(event, frame.f_code.co_name)

# sys.setprofile(print_profiler)


def slow_key(el):
    time.sleep(0.01)
    return 0


for i in range(10):
    list(arr).sort(key=slow_key)

# sys.setprofile(None)