1.1mb of JS actually isn't that bad all things considered... (ugh, angular...)
Looks like an eventSourceBus request is the culprit... it's passing a huge payload on the querystring... Man, have to love "Enterprise" development.
I don't mean to be especially snarky or mean here... I've just spent my entire career for over half my life now developing web based applications across the stack with care. I've been a proponent of SPA for applications and it really is disheartening to see something work so badly. It could be the effect of HN, but even then it's just so many indications that this whole thing is a bloated mess that typically comes from an "enterprise" architect/developer mindset that makes me sad as someone in the practice.