diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f3f454d..f60d7425 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 - Memory and speed improvements, particularly for the Cell Collection, and the Writers.
 
+  See [the Discussion](https://github.com/PHPOffice/PhpSpreadsheet/discussions/2821) for details of performance
+
 ### Deprecated
 
 - Nothing