Shantha Kumar - MCTS
tshanthakumar@iotap.com

Sharepoint site pages by default will reference to core.css file. The core.css has reference to lot of image files and http request will be placed to download the files even if it is not used in the page. This is not a desirable situation for public facing Sharepoint sites.  In order to prevent core.css from being referenced the following CSS link reference has to be removed from the master page

Once the CSS link is removed core.css will not be referred and therefore associated images will not be downloaded.  Below is the snapshot from websiteoptimization.com which shows the number of requests with core.css and without core.css

With core.css

Without core.css