diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7a62be7af..df6d483169 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ Added a Chinese translation: https://difftastic.wilfred.me.uk/zh-CN/
 
 ### Diffing
 
+Improved runtime performance and memory usage (thanks to @QuarticCat).
+
 Standalone `.` is now considered punctuation in the diff cost model,
 which improves diff results in some cases.