What are average (or "typical") times for performance of common
emergency medical procedures/treatments in hospital ERs or by
paramedic EMTs?  Is this information documented anywhere?

are you asking about time of day; or length of time procedures take?
Which procedures are you thinking of?

As question states, I am looking for length of time it takes to
perform procedures.  I need some sort of documented (research-based)
response, not just an opinion or subject matter experts' estimate. 
Any and all sorts of procedures and/or treatments provided in ER or by
EMTs at patient pick-up or enroute would be of interest:  e.g., obtain
vital signs, assess/triage patient, establish airway, control
hemmorhage, start IV, splint fracture, initiate CPR, etc. (finer level
of granularity is certainly acceptable).  Thanks for your interest.