Oh, cool. I made my own attempt at the same kind of idea at https://elmalabarista.com/blog/2022-flat-tree/ https://elmalabarista.com/blog/2022-flat-tree/. Is

Oh, cool. I made my own attempt at the same kind of idea at https://elmalabarista.com/blog/2022-flat-tree/ https://elmalabarista.com/blog/2022-flat-tree/. Is pretty simple actually. What I have observed (and my tree exploit) is that most tree are "too much" and I only have cared by pre-order tree and "sequentially" scan is the major op. So, the major takeaway is that if your case is simple, Go! Go! Vec!