Pre-fetching has been around for some time now and is often used to load images and CSS files. While your mileage may vary, you can also pre-fetch your CDN calls (e.g. Jquery) and make your apps a bit faster by loading scripts in the <head> section to load JS calls before your <script> get resolved by browsers. You can also CDN outage proof it (when it rarely happens ) by having local JS libraries (for rainy days) using some quick jquery checks (based on code from + Hanselman ) Testing Without pre-fetch: Code Snippet < script src ="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></ script > < script > if ( typeof jQuery == 'undefined' ) { document.write(unescape( "%3Cscript src='[yourlocalbackupjqueryfile].js' type='text/javascript'%3E%3C/script%3E" )); } var startTime = new Date(); jQuery.ready(); var endTime = new Date(); var dif
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