https://github.com/python/cpython/commit/11cbf77f9799e86603bca927a98959c7b94fff80
commit: 11cbf77f9799e86603bca927a98959c7b94fff80
branch: main
author: Donghee Na <[email protected]>
committer: corona10 <[email protected]>
date: 2024-04-30T13:42:13+09:00
summary:
gh-118392: Add note about random.random for multi thread app (gh-118396)
files:
M Doc/library/random.rst
diff --git a/Doc/library/random.rst b/Doc/library/random.rst
index 8fbce18c56f17c..61798263d61195 100644
--- a/Doc/library/random.rst
+++ b/Doc/library/random.rst
@@ -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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