Mate, can you really not think this through for yourself?
Firstly, time at the sinks isn't time taking up a cubicle so it's actually totally irrelevant anyway.
Now that's clear, back to the point.
Think through opening the flies, hoiking out the old fella, having a pee, tucking back, flushing if design applies, and (hopefully) washing up and walking out, and then think through the steps a woman will take to perform an equivalent evacuation.
Don't forget your handbag!