Fixed wrong bounding/rounding

V4/demo/demo.cpp

@@ -131,5 +131,5 @@ int main() {
   auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(stop - start);
   
   std::cout << "Mach for CI " << ci << ": " << aioMach << std::endl << std::endl;
-  std::cout << "END All-In-One, " << duration.count() << std::endl ;
+  std::cout << "END All-In-One, " << duration.count() << "ns" << std::endl ;
 }