Zardnaar
Legend
I don't know about 5e but I will say that in 1e I might run ten or twenty encounters in a session without breaking a sweat. Obviously some of those were not major big battles.
You can do that and have the game run at a decent pace. A sleep spell in average takes out 18 kobolds iirc. A fighter can cleave through multiple fodder critters as well.
And you can probably do it over multiple sessions. Less stuff to keep track of.