[issue37859] time.process_time() constant / erratic on Windows

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

> Process times [1] are stored as a 64-bit integer in units of 100 ns (1e-7). But the kernel schedules threads based on a timer that ticks every 15.625 ms by default. It can be lowered to about 0.5 ms, but this degrades battery life.

Patches are welcome to enhance time.get_clock_info() :-)

Don't rely too much on time.get_clock_info() on Linux neither: it basically always say 1 ns, even if the effective resolution is way worse.

See the PEP 418 for some numbers:
https://www.python.org/dev/peps/pep-0418/#process-time

I wrote these programs to write this PEP ;-)

https://github.com/python/peps/tree/master/pep-0418

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nosy: +vstinner

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