diff --git a/notes.md b/notes.md
index f25eb13..9d662fd 100644
--- a/notes.md
+++ b/notes.md
@@ -58,6 +58,12 @@ remove a layer of indirection, too.
 
 It's a big change, but I'd need _something_ like this for adding a GC anyway, and sometimes big changes have paid off.
 
+## Cache constants
+
+Result: Regressed from 3200 to 3600. Not sure why.
+
+Plan: OP_GETFIELD hits the constants a lot. I thought caching it and not dereferencing the chunk and block constantly might help.
+
 ## Iterating over instruction list
 
 (upcoming)