Right, you'd end up returning one bucket too little, or one bucket too much, of your full time window, depending on what tradeoff you decided was OK to have. A

Right, you'd end up returning one bucket too little, or one bucket too much, of your full time window, depending on what tradeoff you decided was OK to have. And yeah, I was thinking of buckets as append-only lists that got dropped in their entirety when out of range.