diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2aff67cc..a0eabb67 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## 0.9 - TBD
 
+This release significantly improves garbage collection performance by using [lazy sweeping](docs/Garbage-Collector-Lazy-Sweeping.md). Improvements are most notable to applications that perform a lot of allocations and have a large number of shortly-lived objects.
+
 ## 0.8.1 - July 2, 2018
 
 Features