Why do some pages with cache kit enabled load slowly

This article applies to:

• SWG 10.x
• SWG 11.x

Question:

• Why do some some pages load slowly with SWG caching kit installed and enabled?

Information:

Some pages/HTTP servers are poorly designed and send confirmations for every page, script, or resource request in a non-parallel manner (one after another). In this example, note the many HTTP messages "HTTP/1.0 304 Not Modified".

As you can see, the server is sending messages one after another; in this case it takes 16 seconds to load a small page with many js scripts:

HOW to fix the issue:

Because it is not an SWG related problem, you must exclude this type of site from caching; add an exception as shown below: