[tepl] File: add comment

[Sébastien Wilmet <swilmet src gnome org>]

commit 0d19ae3ffc115613dde4c8be6d3ed63906aa425b
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue May 19 14:54:37 2020 +0200

    File: add comment

 tepl/tepl-file.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/tepl/tepl-file.c b/tepl/tepl-file.c
index 8589b3d..3f907f9 100644
--- a/tepl/tepl-file.c
+++ b/tepl/tepl-file.c
@@ -311,6 +311,11 @@ update_short_name (TeplFile *file)
                return;
        }
 
+       /* Note: fetching the display name can take a lot of time, for example
+        * for a remote location with a slow response time.
+        * Tested with Slowwly, a test service to mock a slow http response:
+        * http://slowwly.robertomurray.co.uk/
+        */
        g_file_query_info_async (file->priv->location,
                                 G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME,
                                 G_FILE_QUERY_INFO_NONE,