We are currently using v2010 of telerik.web.ui dll in our production environments and planning to move to 2015 very soon. Upon updating in our staging environments we are seeing a massive difference in dll size between the 2 versions. Also the webresource.axd(javascript) in the new version is 1.14MB in size which may cause some performance issues. My question is:

1. Is there a way to reduce this size or do per-need basis loading?
2. Can we refer telerik js files in our master page so that they are not loaded all the time? If so, please let us know how.