Boyhood takes 12 years and condenses it into one sitting. With some sort of mystical time-bending power, Linklater does not lose the slow pace. We still have a chance to savor ordinary moments. There’s no Hollywood makeup, smearing artificial age onto the skin. There’s no switch-up of actors. There is the aging process—that alluring rearrangement of the face and body. The effect is astonishing.