timeit.default_timer() restarted.

[SolsticeProjekt]

I've closed the lid of my notebook.
When I came back, it woke up from sleep.

Now, without changing anything at all, default_timer() returns 1077770.1358825, which is 1970-01-13 12:22:50.135883.

datetime.now() reports the current time.
time.time() also reports the current time.

Microsoft Windows [Version 10.0.19044.1706]
ASUS Zephyrus G15 2021, Ryzen 5900HS, 16gigs of RAM.
Python 3.10.4 (tags/v3.10.4:9d38120, Mar 23 2022, 23:13:41) [MSC v.1929 64 bit (AMD64)] on win32

from timeit import default_timer
import datetime as dt

while True != False:
	print(default_timer(), dt.datetime.fromtimestamp(default_timer()))

[mdickinson]

The value returned by default_timer isn't intended to be usable as a timestamp. From the docs for time.perf_counter, which is what timeit.default_timer maps to:

The reference point of the returned value is undefined, so that only the difference between the results of two calls is valid.

It's also not guaranteed that perf_counter is monotonic. If that's what you need, take a look at time.monotonic.

This isn't a bug, so I'll close here.

[mdickinson]

@SolsticeProjekt I may have misunderstood what you're reporting. What was default_timer() reporting before the sleep, and what was it reporting afterwards?

[mdickinson]

Reclosing. (For clarity, my previous message and the re-opening was in response to a comment from @SolsticeProjekt that has since been deleted.)