diff --git a/README.md b/README.md
index 53db30ccb8..4a26e6fbfb 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,8 @@ ipython3 examples/efficientnet.py webcam
 
 PROTIP: Set "GPU=1" environment variable if you want this to go faster.
 
+PROPROTIP: Set "DEBUG=1" environment variable if you want to see why it's slow.
+
 ### The promise of small
 
 tinygrad will always be below 1000 lines. If it isn't, we will revert commits until tinygrad becomes smaller.