On Wed, Sep 11, 2013 at 09:51:27PM +0700, Henrik Sarvell wrote:
> What is the most efficient way of getting all objects whose ids (+Key
> +Number) are in a list?
> Simply looping db calls or?

Yes, something like

   (mapcar '((Id) (db 'id '+Cls Id)) (1 3 7 9))

There is a little overhead in calling 'db' (which doesn't really matter,
I believe), but in case of '+Key's you can also directly call the
lower-level 'fetch' function which directly accesses the index tree:

   (mapcar '((Id) (fetch '(id . +Cls) Id)) (1 2 3))

♪♫ Alex
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