diff --git a/tools/buildman/README b/tools/buildman/README
index b2f983c..b7442a9 100644
--- a/tools/buildman/README
+++ b/tools/buildman/README
@@ -1129,6 +1129,19 @@
 warnings. Similarly, -Y tells buildman to ignore the migration warnings.
 
 
+Build summary
+=============
+
+When buildman finishes it shows a summary, something like this:
+
+    Completed: 5 total built, duration 0:00:21, rate 0.24
+
+This shows that a total of 5 builds were done across all selected boards, it
+took 21 seconds and the builds happened at the rate of 0.24 per second. The
+latter number depends on the speed of your machine and the efficiency of the
+U-Boot build.
+
+
 How to change from MAKEALL
 ==========================
 
diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
index f2756ea..dbb75b3 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -1677,7 +1677,8 @@
             if duration.microseconds >= 500000:
                 duration = duration + timedelta(seconds=1)
             duration = duration - timedelta(microseconds=duration.microseconds)
-            msg += ', duration %s' % duration
+            rate = float(self.count) / duration.total_seconds()
+            msg += ', duration %s, rate %1.2f' % (duration, rate)
         Print(msg)
 
         return (self.fail, self.warned)