@Millcore:

I've noticed the same when navigating around DA. My best guess is it does unnecessarily stupid things to dynamically load links in the active page, rather than proper page-to-page linking, preventing the browser from reclaiming resources from the pages you've moved away from. Opening links in new tabs and closing the old ones can help, but that's less than ideal.

@Watsit: An IT major I talked to a little after making the blip said that it sounds like crypto mining from javascript on the page.