diff --git a/rust/cryptest/README.md b/rust/cryptest/README.md
index 4d32f8c..debda5c 100644
--- a/rust/cryptest/README.md
+++ b/rust/cryptest/README.md
@@ -1,3 +1,14 @@
 # `cryptest`
 
-Test the cryptographic acceleration engines of the K210.
+Test and benchmark the cryptographic acceleration engines of the K210 compared
+to rust CPU implementations.
+
+Example benchmark output:
+
+```
+SHA256 hw (4194240 bytes): MATCH (12542 kB/s)
+SHA256 hw, 32bit (4194240 bytes): MATCH (18965 kB/s)
+SHA256 sw (4194240 bytes): MATCH (5087 kB/s)
+AES128 hw, 32bit (262144 bytes): (6247 kB/s)
+AES128 sw (262144 bytes): (394 kB/s)
+```