Google Map Shortcode is too slow

Hi, I have used your plugin to show a map in my web with a shortcode like this:

[su_gmap responsive=”no” class=”embed-responsive-item” address=”<?=$mycity . ‘,’ . $mycountry ;?>”]

This code is working, but PageSpeed said there are a lot of calls to maps.googleapis.com. I have thought to use AJAX for the call to maps.googleapis.com will be at the end of the web charge, but i don’t know the way to use it.

Can i take another way to delay this maps.googleapis call? Have i to use AJAX obligatorily? How could i use it?

Thanks!