python 3.x - Shall I use asyncio.create_task() before calling asyncio.gather()?

Question

Was wondering if there is any benefit of directly calling asyncio.gather(*coros) rather than starting the tasks with asyncio.create_task() and then calling asyncio.gather(*tasks).

So I did this test (please tell me if you notice any bias):

import timit

test1 = """
async def sleep():
    await asyncio.sleep(0)
    
async def main():
        tasks = [asyncio.create_task(sleep()) for s in range(1000)]
        await asyncio.gather(*tasks)
asyncio.run(main())
"""

test2 = """
async def sleep():
    await asyncio.sleep(0)

async def main():
        tasks = [sleep() for s in range(1000)]
        await asyncio.gather(*tasks)
asyncio.run(main())
"""

print(timeit.repeat(stmt=test1, setup="import asyncio", repeat=5, number=10000))
print(timeit.repeat(stmt=test2, setup="import asyncio", repeat=5, number=10000))

Here's the result:

>TEST 1 : [123.09070299999999, 118.88883120000001, 120.92030820000002, 121.22180739999999, 116.49616249999997]
>TEST 2 : [109.63426249999998, 108.96809150000001, 110.66497140000001, 105.34163260000003, 105.78473080000003]

Seems like there is no overhead when gather() has to create the tasks - it's even faster (although ensure_future() is called internally, if I understand well).

Any thoughts on this? Shall I follow the pattern used for test 2 rather than the one used for test 1? The Zen does not help much there, but as it outlines, "There should be one-- and preferably only one --obvious way to do it".

question from:https://stackoverflow.com/questions/66066885/shall-i-use-asyncio-create-task-before-calling-asyncio-gather

Answer 1

Waitting for answers