20 lines
417 B
Python
20 lines
417 B
Python
"""
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Timer context manager, only used in debug.
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"""
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from time import time
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import contextlib
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from typing import Generator
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@contextlib.contextmanager
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def timer(subject: str = "time") -> Generator[None, None, None]:
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"""print the elapsed time. (only used in debugging)"""
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start = time()
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yield
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elapsed = time() - start
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elapsed_ms = elapsed * 1000
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print(f"{subject} elapsed {elapsed_ms:.1f}ms")
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