from datetime import date, timedelta
import timeit

class td:
    def __init__(self, days: int = 0):
        self._days = days

    def __radd__(self, other):
        if isinstance(other, date):
            return date.fromordinal(other.toordinal() + self._days)
        return NotImplemented

    def __rsub__(self, other):
        if isinstance(other, date):
            return date.fromordinal(other.toordinal() - self._days)
        return NotImplemented


def _start_days(dt: date, n: int) -> date:
    return date.fromordinal(dt.toordinal() + n)

def with_timedelta():
    dt = date(2024, 1, 1)
    d2 = dt + timedelta(days=10)

def with_start_days():
    dt = date(2024, 1, 1)
    d2 = _start_days(dt, 10)

def with_class_td():
    dt = date(2024, 1, 1)
    d2 = dt + td(10)

NUM = 10_000_000

t1 = timeit.timeit(with_timedelta, number=NUM)
t2 = timeit.timeit(with_start_days, number=NUM)
t3 = timeit.timeit(with_class_td, number=NUM)

print(f"{NUM} times:")
print(f"timedelta = {t1:.3f}")
print(f"_start_days = {t2:.3f} ({(t2/t1 - 1)*100:.2f}%)")
print(f"class td = {t3:.3f} ({(t3/t1 - 1)*100:.2f}%)")