Async sleep

• In Async we can see that they start in the right order, but then get to the finish line after waiting in parallel.

import time
import asyncio

async def say(wid, sec):
    start = time.monotonic()
    print(f"Starting {wid} that will take {sec}s")
    await asyncio.sleep(sec)
    end = time.monotonic()
    print(f"Finishing {wid} in {end-start}s")

async def main():
    start = time.monotonic()
    await asyncio.gather(
        say("First", 2),
        say("Second", 1)
    )
    end = time.monotonic()
    print(f"Elapsed: {end-start}")


asyncio.run(main())

Starting First that will take 2s
Starting Second that will take 1s
Finishing Second in 1.0006165504455566s
Finishing First in 2.002072811126709s
Elapsed: 2.002306482056156