From: neonene <53406459+neonene@users.noreply.github.com>
Date: Thu, 14 Jul 2022 18:33:25 +0000 (+0900)
Subject: gh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (#94842)
X-Git-Tag: v3.12.0a1~958
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9b3f7792093c533608f70043aa2a7daf7f903a16;p=thirdparty%2FPython%2Fcpython.git

gh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (#94842)
---

diff --git a/Misc/NEWS.d/next/Build/2022-07-14-02-45-44.gh-issue-94841.lLRTdf.rst b/Misc/NEWS.d/next/Build/2022-07-14-02-45-44.gh-issue-94841.lLRTdf.rst
new file mode 100644
index 000000000000..f7ad4f88a51d
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2022-07-14-02-45-44.gh-issue-94841.lLRTdf.rst
@@ -0,0 +1 @@
+Fix the possible performance regression of :c:func:`PyObject_Free` compiled with MSVC version 1932.
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index 78a6f01a0964..1d487d8e807a 100644
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -1446,7 +1446,7 @@ static arena_map_bot_t arena_map_root;
 
 /* Return a pointer to a bottom tree node, return NULL if it doesn't exist or
  * it cannot be created */
-static arena_map_bot_t *
+static Py_ALWAYS_INLINE arena_map_bot_t *
 arena_map_get(block *p, int create)
 {
 #ifdef USE_INTERIOR_NODES