Python 3.7+timefunction

time.monotonic_ns()

clocks and timing

The same monotonic clock as monotonic(), but as an integer number of nanoseconds — without float rounding.

Syntax

time.monotonic_ns() -> int

Differences are integers, so they add up in counters and compare for equality without accumulated float error. Do not mix the _ns and plain versions in one difference: one is in seconds, the other in nanoseconds, and an error of 10**9 does not raise — it silently corrupts the result.

Examples

import time
a = time.monotonic_ns()
b = time.monotonic_ns()
print(b - a >= 0, type(b - a).__name__)  # → True int

See also

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