By the way, I agree with the Francois “camp” that a lengthy warm-up is preferred and the camp that suggests some race pace efforts to get the body use to some lactate . …
However . . .The debate below contemplates starting the event fairly close after finishing your warm-up . . . what about the triathlon where you have to “rack your bike by a certain time, transition closes and the event goes off in intervals” whereby you are starting the event some 10-30 minutes AFTER you complete your warm-up
Food for thought