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Actually, I always keep the clients foremost in my mind when coding. But we are probably imagining two different things. I wasn't intending that JavaScript do something computationally intensive. If the browser is showing a week or month calendar, it seems to me that having a bit of javascript interpret a dozen recurrence items ought not be demanding. But having the server do a dozen recurrence item calculations for tens of millions of customers might be prohibitive. I was imagining that few clients would have very many recurring tasks, and that computing the rules wasn't terribly serious. (I've not written it, but I think I could imagine what the code would basically look like.)

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 *only rarely* do web stuff, and haven't written a line of JavaScript in over 10 years. So I really don't know if it's that much of a pig or not.
  • 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! ;^)

In reply to Re^3: precalculating event dates vs.recalculating them. by roboticus
in thread precalculating event dates vs.recalculating them. by schweini

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