If you only have a split second, your imagined scenario, whether you drink coffee or not, can determine if you survive. If not ALL, coffee drinkers are worthless coming out of deep sleep; I speak from experience on the streets. Most of such and alcohol drinkers, if I kicked their door in, walked, not run, up to their stairs and into their bedroom, they would still be lying there trying to decide if they heard something and what it was. They could have a full auto Mac 10 in their lap and die holding it.
The kid's question for you if you have any; others may make another choice.
When civilians dream their scenario, mostly from movies, they imagine that they have it covered if they do this or that. As a cop, you learn quickly. Nothing works as you expect. Do you have an alarm? Do you have dogs? Do you have a wife who does not drink beverages that makes you get dead in deadly scenarios in the dark? Will you shoot your wife in the night since you woke up late due to your bad habits and did not realize she went into the hallway to verify something is going on, and you, one in the chamber, no coffee yet, or alcoholic smell coming out of your pores shoots her with your extra second.
Your Hollywood scenario is not coming. Bad guys know where you are; your bedroom light is the last to go out. They know you do not have an alarm, and if you are in a moderate house, know this or that, and if you are in a prominent rich place with glass doors and large windows, they can peer through the glass determine where your steps are or if there is a movement of dogs and other intel.
Nothing is as you imagine. Prepare your gun as you like. How you respond has nothing to how your gun works, my friend, your life depends on how YOU work!
PS: Your comment, "As SD asked" is childest. I answer to whom I care to, PERIOD!