Very heavily edited, actually. Or spliced together, depending on how you want to look at it. Not "editing" as in shortening, but putting sections together so they worked once assembled. Sort of a pre-cursor to Miles/Teo in that regard. But geez, look at Massey Hall, bass overdubbed non-stop. There's other examples in the Debut era as well. Mingus was not one to reject recording technology as a "compositional tool", ever, not that I can tell.