Many sites use a CDN ( Akamai is one such ) for globalization (ie responding from a geographically local host) and if one of them is slow, then the sources are slow to load . . . [eg:" takes one or two more reloads of the page to finally load"]. Until ALL the webpage source is loaded, the Javascript is not allowed to run, and this creates the dreaded "Long running script" issue for the user.A content delivery network (CDN) is a system of distributed servers (network) that deliver webpages and other Web content to a user based on the geographic locations of the user, the origin of the webpage and a content delivery server.