Microsoft AJAX CDN
Recently Microsoft has launched a new Microsoft Ajax CDN (Content Delivery Network) service that provides caching support for
Using a CDN can significantly improve a website's end-user performance, since it enables browsers to more quickly retrieve and download content. Basically, instead of having a browser request for an image traverse all the way across the Internet to your web server to download, a CDN can instead serve the request directly from a nearby "edge cache" server that might only be a single network hop away from your customer (making it return much faster – which makes your pages load quicker).
e.g. Instead of using the hard path approach, better is to use CDN.
Using CDN with the ASP.NET 4.0 ScriptManager
In addition to allowing you to reference script files directly using a <script> element, ASP.NET 4.0 will make it easy to use the CDN from ASP.NET Web Forms applications that use the <asp:scriptmanager/> server control as below.
<asp:ScriptManager ID="atlSMMaster" EnableCdn="true" runat="server">
This provides a nice end-user performance improvement, and means that users accessing your ASP.NET website won’t need to re-download these files if they have visited another ASP.NET website that uses the CDN.
Hope this helps.
Thanks & Regards,
Arun Manglick || Senior Tech Lead