I agree it’s quick, but it isn’t that out of the ordinary for a domestic flight. Unlike an international I don’t believe any security check of the aircraft would be required in HNL so it’s just a matter of getting the people off, doing a quick tidying of the interior, and boarding again. 772s aren’t really all that big and with two aisles they can board every bit as quick as a 737/A321 if not faster.

The cargo is mostly all containerized on a 777 to my knowledge so that should offload/load pretty fast and then catering, lav service, etc. can all be done during boarding/deplaning.