On Sat, Oct 3, 2009 at 10:09 AM, Josh <[email protected]> wrote:

> The problem here is that count() won't return more than 1000.
>
> It seems I'll have to store the rank with the user, but then the
> challenge is inserting new users, or updating the ranks as scores
> change.

Using the taskqueue API would be ideal here: every time you change
someone's score you fire off a task that will recompute everyone's
rank. There are obvious optimisations that you can make since you'll
be effectively doing an incremental sort of a mostly-sorted list.


Dave.

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