The caching is surprisingly bad: http://www.stevesouders.com/blog/2013/03/18/http-archive-jquery/ http://www.stevesouders.com/blog/2013/03/18/http-archive-jqu..

The caching is surprisingly bad: http://www.stevesouders.com/blog/2013/03/18/http-archive-jquery/ http://www.stevesouders.com/blog/2013/03/18/http-archive-jqu... Facebook did a related study more recently and found that large numbers of users had cold caches (https://code.facebook.com/posts/964122680272229/web-performance-cache-efficiency-exercise/ https://code.facebook.com/posts/964122680272229/web-performa...).