[issue21302] time.sleep (floatsleep()) should use clock_nanosleep() on Linux

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

> On Windows with a Python 3.11 debug build, I get:
> Mean +- std dev: 21.9 ms +- 7.8 ms (228 values)

I wrote an optimization to cache the Windows timer handle between time.sleep() calls (don't close it). I don't think that it's needed because they shortest sleep is about 15.6 ms. CreateWaitableTimerW() is likely way more fast than 15.6 ms. So this optimization is basically useless.

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<https://bugs.python.org/issue21302>
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