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gh-118392: Add note about random.random for multi thread app #118396

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corona10 merged 3 commits into from
Apr 30, 2024
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gh-118392: Add note about random.random for multi thread app #118396

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gh-118392: Add warning about random.random for multi thread app
corona10 Apr 29, 2024
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revise
corona10 Apr 29, 2024
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Address code reivew
corona10 Apr 29, 2024
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6 changes: 6 additions & 0 deletions Doc/library/random.rst
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Expand Up @@ -59,6 +59,12 @@ from sources provided by the operating system.
random number generator with a long period and comparatively simple update
operations.

.. note::
The global random number generator and instances of :class:`Random` are thread-safe.
However, in the free-threaded build, concurrent calls to the global generator or
to the same instance of :class:`Random` may encounter contention and poor performance.
Consider using separate instances of :class:`Random` per thread instead.


Bookkeeping functions
---------------------
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