1+N is clearer I think, and what I remember seeing in the past - it matches what's actually happening with this problem. First time I saw N+1 sometime around a year ago, I had no idea it referred to the same thing and thought it was something different.
N+1 looks like an issue with aggregation after a parallel run, something I've encountered with celery tasks before.
N+1 looks like an issue with aggregation after a parallel run, something I've encountered with celery tasks before.