diff --git a/downloader.py b/downloader.py
index 4a1bc22..8875eda 100644
--- a/downloader.py
+++ b/downloader.py
@@ -27,6 +27,7 @@ def download_file(chunk_size=4 * 1024, file_size=100 * 1024 * 1024, longest_time
         server_name = server["name"]
         chunk_read = 0
         s_time = datetime.datetime.now()
+        print('start time:{s_time}'.format(s_time=s_time))
         duration = longest_time
         try:
             with requests.get(url, stream=True, timeout=longest_time) as r:
@@ -44,6 +45,7 @@ def download_file(chunk_size=4 * 1024, file_size=100 * 1024 * 1024, longest_time
                                 )
                             )
                             break
+            print('end time:{e_time}'.format(e_time=e_time))
             speed = chunk_read / duration / 1024 / 1024 * 8  # mega bit
             model.add_record(execution_datetime,server_name, speed)
             print("{server}:{speed} Mbit/s".format(server=server_name, speed=speed))