When you wake up, how long does it take for your brain's "OS" to "resume from hibernation"? - sh.itjust.works

I mean like: How long does it take before you brain goes: oh shit, I exist… I remember, I am a living thing, human, my name is [■■■ ■■■] and my current location is [■■■] and oh shit I’m late for [work/school/event] (or if its weekend, its like: oh… nothing’s happening, life is boring) Like you know what I’m saying, like the Terminator HUD thing after it reboots and it takes a few seconds before it can identify a target and then recognize its mission… that type of thing. Or do you wake up and within 1 nanosecond realize the state of your existence?