Eryk Sun <eryk...@gmail.com> added the comment:

> suggest to use time.perf_counter_ns() instead of time.perf_counter() 
> for best precision.

QPC typically has a frequency of 1e7, which requires 24 bits for the fraction 
of a second. So a system can be up for years before the 53-bit precision of a 
float is an issue. What am I missing?

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nosy: +eryksun

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<https://bugs.python.org/issue37205>
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