diff --git a/docs/Lazy-Sweeping.md b/docs/Lazy-Sweeping.md
index a0ca7873..75ae4f53 100644
--- a/docs/Lazy-Sweeping.md
+++ b/docs/Lazy-Sweeping.md
@@ -169,7 +169,7 @@ Graph benchmarks in the google docs spreadsheet
 
 # Conclusion
 
-wrap this up...
+TODO: from GC handbook, lazy sweeping performs best when most of the heap is empty
 
 # References