[jefftk]

>If we were to believe this, we would conclude that moving requested resources from HTTP 1.1 to 2 gives a 1.8x speed-up, while going from HTTP 2 to 3 causes 0.6x slow down. Is it really true that HTTP 3 is a slower protocol? No: A more likely explanation is that HTTP 3 is rare, and that the few resources that are being sent over HTTP 3 (e.g. Google Analytics) are things that have a larger than average effect on dominteractive.

If you wanted to measure the effect of protocol, you could compare requesting with support HTTP/N to requesting with support for HTTP/N+1. Since this is all synthetic testing it shouldn't be too hard to run a controlled experiment instead of a correlational one.