I just want to note how fast this page is. 806kB transferred. 766ms to finished. I hit the DFW AWS CloudFront pop from here. Similar page for BK https://www.burgerking.co.jp/menu 31MB transferred. 6.5s to finished. Hits the DEN pop (but it's a "miss"). I am in Colorado. uBlock is on. Even if you don't count the 7.5MB of fonts on the BK page, that's wild.
McDonalds actually seems to have learned to take latency seriously. When their touch screen ordering systems were first deployed, the delay between tapping on an item or button was quite noticeable. These days the systems respond nearly instantaneously. I'm very glad there are people inside such a large organization that pay attention to that aspect of usability. Now if only every other website on the internet would…
Just low end uncustomised NUCs overheating behind the screen
No idea if that’s still the case