61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
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from __future__ import annotations
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from asyncio import Future, get_running_loop
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from threading import Event, Thread
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from time import perf_counter, sleep
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class Sleeper(Thread):
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def __init__(
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self,
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) -> None:
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self._exit = False
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self._sleep_time = 0.0
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self._event = Event()
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self.future: Future | None = None
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self._loop = get_running_loop()
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super().__init__(daemon=True)
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def run(self):
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while True:
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self._event.wait()
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if self._exit:
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break
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sleep(self._sleep_time)
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self._event.clear()
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# self.future.set_result(None)
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assert self.future is not None
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self._loop.call_soon_threadsafe(self.future.set_result, None)
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async def sleep(self, sleep_time: float) -> None:
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future = self.future = self._loop.create_future()
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self._sleep_time = sleep_time
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self._event.set()
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await future
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async def check_sleeps() -> None:
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sleeper = Sleeper()
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sleeper.start()
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async def profile_sleep(sleep_for: float) -> float:
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start = perf_counter()
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while perf_counter() - start < sleep_for:
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sleep(0)
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elapsed = perf_counter() - start
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return elapsed
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for t in range(15, 120, 5):
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sleep_time = 1 / t
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elapsed = await profile_sleep(sleep_time)
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difference = (elapsed / sleep_time * 100) - 100
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print(
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f"sleep={sleep_time*1000:.01f}ms clock={elapsed*1000:.01f}ms diff={difference:.02f}%"
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)
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from asyncio import run
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run(check_sleeps())
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