Sleeping before reading makes your nervous system to respond fast to stimuli. It makes your brain to feel less pressure, have you ever imagined why you seem to forget more when you spend most of your night trying to jack things up? The reason behind this is because you fail to allow the brain to have a proper rest, so as to mediate on messages that have been packed in it.
The typical example is during examination periods when students try to get the whole textbooks or material stored into their brain just in one night without proper sleep. No! It’s bad for your mental health, you must have at least 3 to 4hrs sleep so as to maintain a healthy brain and fight off loss of accommodation.
Try this and testify to others.