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Context Manager for Timing Blocks

Wrap a code block in a context manager that measures elapsed time, so timing instrumentation is added without clutter or manual bookkeeping.

PythonResilience

Code

snippet
import time
from contextlib import contextmanager


@contextmanager
def timer(label: str):
    start = time.perf_counter()
    try:
        yield
    finally:
        elapsed_ms = (time.perf_counter() - start) * 1000
        print(f"{label}: {elapsed_ms:.2f}ms")


with timer("query"):
    total = sum(i * i for i in range(10000))

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