On App Engine, what does optimization for reads mean?

Posted by Honza Pokorny on Stack Overflow See other posts from Stack Overflow or by Honza Pokorny
Published on 2010-04-22T21:11:48Z Indexed on 2010/04/22 21:13 UTC
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python

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google-app-engine

In the documentation for Google App Engine, it says that when designing data models for the datastore, you should "optimize for reads, not writes". What exactly does this mean? What is more 'expensive', CPU intensive or time consuming?

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