Just a small note for anyone who might care: memcache.get_multi,
memcache.set_multi, db.put, and db.get all appear to count as a single
call in quota accounting. This isn't quite clear from the
documentation.

Additionally, batch DS fetches of 32 entities (by key) is only
marginally slower (at 100..199ms) to fetching 16 entities using the
same method (70..120ms). A fetch of a single entity is in the range
15..50ms.

A conclusion that can be drawn from this is: use batch operations at
all costs. If not for the obvious performance gains, then perhaps to
save on quota.


David.

-- 
It is better to be wrong than to be vague.
  — Freeman Dyson

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