How effective is asynchrony for synchronous tasks?

test_async.py

import asyncio
import time


def sync_print_performance(func):
    def wrapper(*args, **kwargs):
        begin = time.monotonic()
        result = func(*args, **kwargs)
        duration = time.monotonic() - begin
        print(f'Time execution of {func.__name__}: {duration * 1000:.2f} ms')
        return result

    return wrapper


def async_print_performance(func):
    async def wrapper(*args, **kwargs):
        begin = time.monotonic()
        result = await func(*args, **kwargs)
        duration = time.monotonic() - begin
        print(f'Time execution of {func.__name__}: {duration * 1000:.2f} ms')
        return result

    return wrapper


def sync_mul(a: int, b: int) -> int:
    return a * b


async def async_mul(a: int, b: int) -> int:
    return a * b


@sync_print_performance
def execute_sync_funcs(exc_number: int):
    for i in range(exc_number):
        sync_mul(i, i * 2)


@async_print_performance
async def execute_async_coros(exc_number: int):
    for i in range(exc_number):
        await async_mul(i, i * 2)


@async_print_performance
async def execute_async_tasks(exc_number: int):
    for i in range(exc_number):
        await asyncio.create_task(async_mul(i, i * 2))


@async_print_performance
async def execute_async_all_coros(exc_number: int):
    tasks = []

    for i in range(exc_number):
        tasks.append(async_mul(i, i * 2))

    await asyncio.gather(*tasks)


@async_print_performance
async def execute_async_all_tasks(exc_number: int):
    tasks = []

    for i in range(exc_number):
        tasks.append(asyncio.create_task(async_mul(i, i * 3)))

    await asyncio.gather(*tasks)


async def main():
    exc_number = 10000

    execute_sync_funcs(exc_number)
    await execute_async_coros(exc_number)
    await execute_async_tasks(exc_number)
    await execute_async_all_coros(exc_number)
    await execute_async_all_tasks(exc_number)


if __name__ == '__main__':
    asyncio.run(main())

Time execution of execute_sync_funcs: 1.69 ms
Time execution of execute_async_coros: 3.21 ms
Time execution of execute_async_tasks: 602.52 ms
Time execution of execute_async_all_coros: 124.38 ms
Time execution of execute_async_all_tasks: 129.87 ms