Is there any research (or even opinion pieces) on the difference between spreading sleep evenly over days or catching-up at certain times? I normally aim for a

Is there any research (or even opinion pieces) on the difference between spreading sleep evenly over days or catching-up at certain times? I normally aim for a couple of nights a week of full sleep (no alarm clock), and the past week and a half I pushed this - 3-4 hours a night for 9 nights (with an exception of 7 hours once in the middle), which left me needing two really long nights the last couple of days. But is it any better or worse this way? For example the difference between 6 hours a night over the whole week (42 hours total) or 4 hours a night for five days then 11 hours a night for the other two?