import sys
import _overlapped

def total():
    return sys.gettotalrefcount()

if not hasattr(sys, "gettotalrefcount"):
    raise SystemExit("need a debug build (Py_DEBUG) for gettotalrefcount")

before = total()

N = 20000
STEP = 1000

for i in range(1, N + 1):
    ov = _overlapped.Overlapped()
    buf = memoryview(bytearray(4096))
    try:
        ov.WSASendTo(0x1234, buf, 0, ("127.0.0.1", 1))
    except OSError:
        pass

    if i % STEP == 0:
        now = total()
        print(f"{i:6d}: totalrefcount delta = {now - before:+d}")

after = total()
print(f"done: N={N}, totalrefcount delta = {after - before:+d}")