mirror of https://github.com/JDAI-CV/fast-reid.git
69 lines
1.8 KiB
Python
69 lines
1.8 KiB
Python
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# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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# -*- coding: utf-8 -*-
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from time import perf_counter
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from typing import Optional
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class Timer:
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"""
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A timer which computes the time elapsed since the start/reset of the timer.
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"""
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def __init__(self):
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self.reset()
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def reset(self):
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"""
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Reset the timer.
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"""
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self._start = perf_counter()
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self._paused: Optional[float] = None
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self._total_paused = 0
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self._count_start = 1
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def pause(self):
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"""
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Pause the timer.
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"""
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if self._paused is not None:
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raise ValueError("Trying to pause a Timer that is already paused!")
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self._paused = perf_counter()
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def is_paused(self) -> bool:
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"""
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Returns:
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bool: whether the timer is currently paused
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"""
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return self._paused is not None
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def resume(self):
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"""
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Resume the timer.
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"""
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if self._paused is None:
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raise ValueError("Trying to resume a Timer that is not paused!")
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self._total_paused += perf_counter() - self._paused
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self._paused = None
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self._count_start += 1
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def seconds(self) -> float:
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"""
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Returns:
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(float): the total number of seconds since the start/reset of the
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timer, excluding the time when the timer is paused.
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"""
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if self._paused is not None:
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end_time: float = self._paused # type: ignore
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else:
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end_time = perf_counter()
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return end_time - self._start - self._total_paused
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def avg_seconds(self) -> float:
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"""
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Returns:
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(float): the average number of seconds between every start/reset and
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pause.
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"""
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return self.seconds() / self._count_start
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