Bytes by Object's Source This report shows the number of bytes transferred from each source (Internet, Parent or sibling cache, etc.). This report is useful to analyze the performance of your array. Bytes by Object's Source Some explanation about common codes: DIRECT This means that the object was fetched from the object's origin, i.e. usually the Internet's server. NONE This usually means that the object was returned from the local cache. Other codes usually refers to the cache's hierarchy.