One div?
The netizen, Joshua Bakita, gave as "just one example" the appearance of a seemingly useless empty HTML div tag in YouTube videos that had the effect of slowing down the Edge browser. According to the intern, that tag caused "our hardware acceleration fast-path to bail" with the result that the browser's speed advantage over Google's Chrome disappeared.
Yeah... I'm guessing that this is a bug in Edge. It seems both sides forgot to go into Postel mode - "be conservative in what you send, be liberal in what you accept*".
* or words to that effect, anyway: https://en.wikipedia.org/wiki/Robustness_principle
Biting the hand that feeds IT
