I believe the only small operations are (a) getting a key from an index in a query, and (b) allocating a new key.
(b) doesn't come up too often for me but (a) is useful in reducing Database Read costs by allowing me to grab the keys for a query (already sorted) before actually getting the entity contents. I use this on paged queries to cache the prev/next page's results without getting the entities until the page is needed. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
