Urgent-start flag should be only marked for channels which are triggered by user interaction. So, I think we can skip URI classifier and directly jump to connect.

(In reply to Kershaw Chang [:kershaw] from comment #0) > Urgent-start flag should be only marked for channels which are triggered by > user interaction. So, I think we can skip URI classifier and directly jump > to connect. Does this sound reasonable to you, Honza?

Absolutely not. Only indication of not doing classification on the URI is missing LOAD_CLASSIFY_URI flag - not something urgent-start or any other class should have an effect on. Generally - anything else MUST NOT affect classification. Every navigation or load must be classified unless explicitly turned off by the user. I would not give the urgent-start flag that big weight. It's a nice to have optimization that may help under a heavy utilization of traffic to the same origin, but it doesn't mean anything else.