diff --git a/vvm/README.md b/vvm/README.md
index f7abe0a..6f35541 100644
--- a/vvm/README.md
+++ b/vvm/README.md
@@ -23,6 +23,9 @@ This does not say anything about overall performance though and I am not
 sure whether this small, funny test has any real value in measuring performance.
 Also, Python is much more feature-rich, so you cannot compare the two at all.
 
+DISCLAIMER: Parsing takes quite a long time, so try to write your programs as 
+concise as possible.
+
 Instruction set
 ---------------