better autocomplete

autocomplete/autocomplete.go

@@ -111,3 +111,12 @@ func inorder(a, b string) bool {
 	}
 	return true
 }
+
+// Metrics gets the number of buckets in the autocomplete set and the length
+// of the longest bucket.
+func (s *Set) Metrics() (buckets, longest int) {
+	for _, b := range s.keys {
+		longest = max(longest, len(b))
+	}
+	return len(s.keys), longest
+}