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Lazy import asyncio.sleep as it's expensive #450

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merged 1 commit into from
Mar 14, 2024
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Lazy import asyncio.sleep as it's expensive #450

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12 changes: 10 additions & 2 deletions tenacity/_asyncio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@
import functools
import sys
import typing as t
from asyncio import sleep

from tenacity import AttemptManager
from tenacity import BaseRetrying
Expand All @@ -31,11 +30,20 @@
WrappedFn = t.TypeVar("WrappedFn", bound=t.Callable[..., t.Awaitable[t.Any]])


def asyncio_sleep(duration: float) -> t.Awaitable[None]:
# Lazy import asyncio as it's expensive (responsible for 25-50% of total import overhead).
import asyncio

return asyncio.sleep(duration)


class AsyncRetrying(BaseRetrying):
sleep: t.Callable[[float], t.Awaitable[t.Any]]

def __init__(
self, sleep: t.Callable[[float], t.Awaitable[t.Any]] = sleep, **kwargs: t.Any
self,
sleep: t.Callable[[float], t.Awaitable[t.Any]] = asyncio_sleep,
**kwargs: t.Any,
) -> None:
super().__init__(**kwargs)
self.sleep = sleep
Expand Down