Not the author but: - Repeated images probably come from quoted tweets (when you quote a tweet and reply by adding something). If you pull a twitter API feed,

Not the author but: - Repeated images probably come from quoted tweets (when you quote a tweet and reply by adding something). If you pull a twitter API feed, you'll get many of these. - Not sure, but it's possible that ever-changing images cause lots of reflow. What happens between the moment you set the src attribute and the moment the image loads ? I'd have to test, but I think a reflow of everything is worse than painting to canvas. - Looking through dev tools, images are hotlinked.