Improve App Engine performance by reducing entity size

Question

The objective is to reduce the CPU cost and response time for a piece of code that runs very often and must db.get() several hundred keys each time.

Does this even work

Answer 1

To remove properties from an entity, you can change your Model to an Expando, and then use delattr. It's documented in the App Engine docs here:

http://code.google.com/intl/fr/appengine/articles/update_schema.html

Under the heading "Removing Deleted Properties from the Datastore"