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author	Sam Gross <colesbury@gmail.com>
	Tue, 24 Mar 2026 18:29:37 +0000 (14:29 -0400)
committer	GitHub <noreply@github.com>
	Tue, 24 Mar 2026 18:29:37 +0000 (14:29 -0400)
commit	60093096ba62110151d822b072a01061876e9404
tree	437b8b4044ae8e058e7c116c52dfd517e81b3721	tree \| snapshot
parent	535b09c19d2147e52f0257f2a7dbd78e617f8cce	commit \| diff

gh-146041: Avoid lock in sys.intern() for already interned strings (gh-146072)

Fix free-threading scaling bottleneck in sys.intern and `PyObject_SetAttr` by
avoiding the interpreter-wide lock when the string is already interned and
immortalized.

InternalDocs/string_interning.md		diff \| blob \| blame \| history
Misc/NEWS.d/next/Core_and_Builtins/2026-03-17-00-00-00.gh-issue-146041.7799bb.rst	[new file with mode: 0644]	blob
Objects/object.c		diff \| blob \| blame \| history
Objects/unicodeobject.c		diff \| blob \| blame \| history
Tools/ftscalingbench/ftscalingbench.py		diff \| blob \| blame \| history

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