I'm only aware of this slightly older (11/2011) article [1] on the topic. I've poked at the numbers recently in Big Query and see a wide spread for jQuery versi

I'm only aware of this slightly older (11/2011) article [1] on the topic. I've poked at the numbers recently in Big Query and see a wide spread for jQuery versions on popular sites. Maybe one of these days I'll get around to documenting it properly. I'd rather measure from a sampling of client side pageloads but this might be a bigger project to tackle. [1] http://statichtml.com/2011/google-ajax-libraries-caching.html http://statichtml.com/2011/google-ajax-libraries-caching.htm... [2] http://stackoverflow.com/questions/29930805/measuring-visitor-http-cache-hit-ratio-for-external-cdn-resources http://stackoverflow.com/questions/29930805/measuring-visito...