import asyncio
import perf


async def func():
    pass


fut = asyncio.ensure_future(func())
not_fut = func()
def bench_isfuture():
    for i in range(10000):
        asyncio.isfuture(fut)
        asyncio.isfuture(not_fut)

runner = perf.Runner()
runner.bench_func('ensure_future', bench_isfuture)