Hi,
It would be really nice if the /Admin/Content/JsLib/dw/Analytics.js script could be changed. I think it should be placed in the footer and with the async and defer attributes (take a look at this artilce for more information: https://www.igvita.com/2014/05/20/script-injected-async-scripts-considered-harmful/)
If you change it to async and defer you'll probably have to changes som of the js, because the onload / DOMContentLoaded will be fired before the script is loaded.
The reason I would like this, is that with this very small change my page speed score (from pagespeed insights https://developers.google.com/speed/pagespeed/insights/) on one of our sites goes from 74 > 79 on mobile and from 96 > 98 on desktop. I know it may sound like a litlle increase, but as Google looks even more at performance, I think it would be worth it :-)
And one last thing: could you minify the script as well?
Let me know what you think.