My son did not sleep for eleven months. Like, at all. It was as exhausting as it sounds. And the fact that he did not sleep made it easier for me to follow the advice of the zillions of people who told me to put him in his own crib as soon as possible so he could learn how to "self-soothe" (a.k.a. cry endlessly, forever and ever and ever), mostly because not-sleeping next to me and not-sleeping over there in the crib that was ten feet away from our bed (because we lived in a one-bedroom apartment at the time) was six of one, half a dozen of the other.
And what it all added up to was that none of us slept. Ever. For the better part of a year.