Having said that, I'm not intending to backpedal. I'm just saying that I don't think it would be very demanding at all (but I've been wrong before). I was simply intending to promote "compute it as you need it" rather than "bulk compute in case you need it".
- I'm not imagining terribly complicated recurrence rules.
- I'm anticipating very few customers with very many recurrence rules.
- And I'm *certainly* not advocating that Google treat our machines as a compute-farm! ;^)