diff --git a/NEWS b/NEWS
index 81b95d59e0e..46b14992797 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,7 @@ PHP                                                                        NEWS
   . Implement #71517 (Implement SVG support for getimagesize() and friends).
     (nielsdos)
   . Optimized PHP html_entity_decode function. (Artem Ukrainskiy)
+  . Minor optimization to array_chunk(). (nielsdos)
 
 - URI:
   . Empty host handling is fixed. (Máté Kocsis)
diff --git a/UPGRADING b/UPGRADING
index 373e8dba1fd..435cc9b173b 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -697,6 +697,7 @@ PHP 8.5 UPGRADE NOTES
   . Improved unpack() performance with nameless repetitions by avoiding
     creating temporary strings and reparsing them.
   . Improved pack() performance.
+  . Minor improvements in array_chunk() performance.
 
 - XMLReader:
   . Improved property access performance.