I don’t know how they do it. But I know they have more than 6,000 computers doing their work. They search around 1.2B web sites in under .5 second & before you can blink, the web page results show up in your browser. Even a near blank page couldn’t display that fast.
It’s great for searching for people too. Just input their name in the box.
Spiffy. Unless someone has a faster web site to mention 