What does Judaism have to say about sleep? 1b - sleeping v. napping

They said of Rabban Yoḥanan ben Zakkai: In all his days he never engaged in idle conversation; and he never walked four cubits without Torah and without tefillin; and no person ever arrived at the study hall before him; and he never slept in the study hall, neither fixed sleep nor a nap.

GEMARA: [a discussion about eating the Avikomen] What are the circumstances of dozing?

Rav Ashi said: Asleep but not asleep, awake but not awake. For instance, if they call him, he will answer, but he cannot reply meaningfully. And when they later inform him he remembers it.

Abaye was sitting before Rabba, and he saw that Rabba was dozing [after eating the afikoman]

He said to him: Is the Master sleeping? Rabba replied: I am dozing. And we learned in the mishna: “If they dozed, they may eat from the Paschal lamb, but if they fell fast asleep they may not eat it.”

And how long is a brief nap? Rami bar Yeḥezkel taught: Like walking one hundred cubits.

[Apropos the duration of a brief nap] Rav said: It is prohibited for a person to sleep during the day longer than the sleep of a horse. And how long is the sleep of a horse? Sixty breaths.

Abaye said: The sleep of the Master, Rabba, is like that of Rav, and that of Rav is like that of Rabbi Yehuda HaNasi. And that of Rabbi Yehuda HaNasi is like that of King David, and that of King David is like that of a horse. And that of a horse is sixty breaths.

Abaye would sleep during the day for a period equivalent to the time it takes to enter from Pumbedita to Bei Kuvei.

Rav Yosef said of him “How long will you sleep, sluggard? When will you arise from your sleep?” (Proverbs 6:9).

Rabbi Elazar, son of Rabbi Shimon, found a certain officer [parhagavna] who job was to arrest thieves. He said to the officer: How are you able to arrest them? Aren’t they likened to beasts, as it is written: “You make darkness and it is night, in which all the beasts of the forest creep forth” (Psalms 104:20)? Or some say he quoted: “He lies in wait in a secret place as a lion in his lair, he lies in wait to catch the poor; he catches the poor when he draws him up in his net” (Psalms 10:9).

Perhaps you apprehend the righteous and leave the wicked alone? The officer said to him: But what should I do? It is the king’s edict.

Rabbi Elazar said: Come and I will instruct you how you should do it. At the fourth hour of the day enter the tavern. When you see someone drinking wine, holding his cup in his hand, and dozing, inquire about his background.

If he is a Torah scholar and is dozing, having risen early to study.

If he is a daytime laborer, assume that he rose early and performed his work.

And if his work is at night drawing copper wires.

And if not, he is a thief - arrest him.

Rav Yehuda said: Night was created only for sleep.

Rabbi Shimon ben Lakish said: The moon was created only for Torah study.

When people said to Rabbi Zeira: Your teachings are sharp, he said : I derived them during the daytime.

Rav Ḥisda’s daughter said to her father, Rav Ḥisda: Doesn’t the Master wish to sleep a little?

He said to her: Days that are long but short will soon arrive, and we will sleep a lot.

Rav Naḥman bar Yitzḥak said: We are day workers

Rav Aḥa bar Ya’akov would borrow and repay.