The feed for vice.com is super-slow to display on chrome for Windows. Seems ok on Firefox.
I’m having the same issue with the Engadget RSS feed (http://www.engadget.com/rss.xml). Navigating through the feed is very slow. I tried Vice as well (http://www.vice.com/rss) like the OP, and had the same results.
I’m using Vivaldi browser (Chromium based). Checking the browser task manager shows me the Newsblur tab jumps to 100% CPU usage whenever I scroll the feed. Usage stays minimal for other feeds. Runs perfectly on Edge.
This is still occurring, and also noticed the Engadget feed browsing is equally slow and jittery on the Android Newsblur app.