<snip>
Since the devs implemented resource loader it has become harder and harder to block the poorly developed bloat that has crept into mediawiki. I used to be able to isolate the JavaScript file causing the issues (I remember BITS geolocation being a major hog) and just block it. Now thats not possible any longer.
<snip>
Slightly off topic, but for this problem at least you could try using ?debug=true which will turn off that portion of Resource Loader.
Thank you, Derric Atzrott