Add js minification and css bundling for assets used in master page like it works on fly in CQ5
page load time and http requests made by page should reduce to greater extent. page load time of sharepoint is always high due to lots of JS and CSS files loading. Though caching is implemented the page load time never shines. Other WCM Tools like Adobe CQ5 are very good in minification of JS and CSS files which make page load drastically less.