gh-139038: Add whatsnew entry for jit unique reference tracking (GH-148572)

Co-authored-by: Ken Jin <kenjin4096@gmail.com>

diff --git a/Doc/whatsnew/3.15.rst b/Doc/whatsnew/3.15.rst
index 0253bb6cb717f340f14fc07a142787956a624e1a..485480802feb9730e01db3c9c90d8c024391facb 100644 (file)
--- a/Doc/whatsnew/3.15.rst
+++ b/Doc/whatsnew/3.15.rst
@@ -1462,8 +1462,12 @@ reduces the cost of most operations in Python.
 (Contributed by Ken Jin, Donghee Na, Zheao Li, Hai Zhu, Savannah Ostrowski,
 Reiden Ong, Noam Cohen, Tomas Roun, PuQing, Cajetan Rodrigues, and Sacul in :gh:`134584`.)
 
+By tracking unique references to objects, the JIT optimizer can now eliminate
+reference count updates and perform inplace operations on ints and floats.
+(Contributed by Reiden Ong, and Pieter Eendebak in :gh:`143414` and :gh:`146306`.)
+
 The JIT optimizer now supports significantly more operations than in 3.14.
-(Contributed by Kumar Aditya, Ken Jin, and Sacul in :gh:`131798`.)
+(Contributed by Kumar Aditya, Ken Jin, Jiahao Li, and Sacul in :gh:`131798`.)
 
 .. rubric:: Better machine code generation