<slightly offtopic> I remember a story about Google doing some optimization on YouTube page to make it load faster. They done it, tested and then deployed chang

<slightly offtopic> I remember a story about Google doing some optimization on YouTube page to make it load faster. They done it, tested and then deployed changes to main site. After that they had seen that average page load time increased despite that page definitely loaded faster with fix. In the end they realized that lots of people from 3rd world could now load YouTube not in say 20-30 seconds but in 5-10 seconds (don't remember exact values) and so it changed from unreasonably long to acceptable. And so massive influx of slow clients dropped average time of page load. That was a few years ago, so we can see that there are still maybe millions of people with very slow Internet connection out there.