Any ideas on what is used to power the graph demo used about 9 minutes in (https://youtu.be/MI07aeZqeco?t=539 https://youtu.be/MI07aeZqeco?t=539)? I haven't see

Any ideas on what is used to power the graph demo used about 9 minutes in (https://youtu.be/MI07aeZqeco?t=539 https://youtu.be/MI07aeZqeco?t=539)? I haven't seen something so fast and seamless in a browser.