52 lines
1.2 KiB
Python
52 lines
1.2 KiB
Python
from time import perf_counter_ns
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from .types import IntOrNone
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def ns_to_string(ns: int) -> str:
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units = ['ns', 'µs', 'ms', 's']
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unit = 0
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while ns > 1_000:
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ns /= 1_000
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unit += 1
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if unit == len(units) - 1:
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break
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return f"{ns:1.2f}{units[unit]}"
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class StopWatch:
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started: IntOrNone = None
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stopped: IntOrNone = None
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def __init__(self, auto_start=True):
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if auto_start:
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self.start()
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def start(self):
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self.started = perf_counter_ns()
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self.stopped = None
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def stop(self) -> int:
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self.stopped = perf_counter_ns()
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return self.elapsed()
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reset = start
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def elapsed(self) -> int:
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if self.stopped is None:
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return perf_counter_ns() - self.started
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else:
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return self.stopped - self.started
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def avg_elapsed(self, divider: int) -> int:
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return self.elapsed() // divider # in ns precision loosing some rounding error probably will not hurt
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def elapsed_string(self):
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return ns_to_string(self.elapsed())
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def avg_string(self, divider: int) -> str:
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return ns_to_string(self.avg_elapsed(divider))
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def __str__(self):
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return self.avg_string(1)
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