It paints a misleading picture. When this demo first came out, it didn't have the right reply header to enable pipelining in the browser. Now it does, but bro

It paints a misleading picture. When this demo first came out, it didn't have the right reply header to enable pipelining in the browser. Now it does, but browsers have removed pipelining support. Pipelining is a part of HTTP/1.1. If you download a firefox from before they removed pipelining you can enable it and you'll see that there's essentially no advantage to HTTP/2 for this demo. This demo could measure connection establishment time and bandwidth, and simulate pipelines. But I think they don't actually want you to know that even a 6-connection 1-deep pipeline is just about as good as HTTP/2.