сделал варик 3

project/main.cpp

@@ -49,15 +49,23 @@ download(const string& address)
     if(curl)
     {
         CURLcode res;
+        curl_off_t speed;
         curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
         res = curl_easy_perform(curl);
+
         if (res != CURLE_OK)
         {
             fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(res));
             exit(1);
         }
+        res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD_T, &speed);
+        if(!res)
+        {
+            cerr<<"Download speed bytes/sec:  " <<speed;
+        }
+
         curl_easy_cleanup(curl);
 
     }