_.cpp enhanced with time measurement.

templates/_.cpp

@@ -8,10 +8,18 @@ VIM-: let b:argv=""
 */
 #include <iostream>
 #include <exception>
+#include <chrono>
 
 int main ( void )
 {try{
+    auto begin = std::chrono::high_resolution_clock::now();
 
+
+    //......
+
+    auto end = std::chrono::high_resolution_clock::now();
+    std::chrono::duration<double> seconds = end - begin;
+    std::cout << "Time: " << seconds.count() << std::endl;
     return 0;
 }
 catch ( const std::exception& e )