I'm facing very serious problem while adding core, lob, dv js files in my master/layout page. below is the links which i'm adding.

Problem is regarding loading time, these are some points for my explanation,

1. When browser does not have cache of these js/css files, it is taking too much time to load which dramatically slow down my website.

2. After cache it works fine BUT next day or another day, it takes minimum of 3-5 seconds which never be happened.

Please suggest me about this happening or suggest other js/css/images reference.

<!-- Ignite UI Required Combined JavaScript Files --> 

<script src="http://cdn-na.infragistics.com/igniteui/2014.2/latest/js/infragistics.core.js"></script> 

<script src="http://cdn-na.infragistics.com/igniteui/2014.2/latest/js/infragistics.lob.js"></script>

<script src="http://cdn-na.infragistics.com/igniteui/2014.2/latest/js/infragistics.dv.js"></script>

Thanks in advance if i'm resolved with this problem. 

Really, it hearts my website badly. 

Please Help Me! To get rid from this.