Time a block of code

Python

A context manager that prints how long its body took, without scattering time.perf_counter calls through the function.

import time
from contextlib import contextmanager

@contextmanager
def timed(label):
    start = time.perf_counter()
    try:
        yield
    finally:
        print(f'{label}: {time.perf_counter() - start:.3f}s')

with timed('import'):
    load_everything()

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Python profiling contextmanager chris

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