I don't think HNL is really that efficient: it's just so far away that any standard percentage-based schedule pad will overcompensate it (i.e., if I always add

I don't think HNL is really that efficient: it's just so far away that any standard percentage-based schedule pad will overcompensate it (i.e., if I always add 5% to a schedule, but actual delays are independent of the flight length, then I will underpad a 1-hour flight and overpad a 12-hour flight).