Sorry about late response...

Thank you for your reply and answer for my question.
I haven't care about ListProperty performance..
I'll read the articles of the links you've written.

E.Yamada


On May 27, 1:32 am, Robert Kluin <robert.kl...@gmail.com> wrote:
> Hi,
>   The number of entities should have effectively no impact on query
> performance; the number of results returned by a query will of course
> impact performance (fetching more takes longer).  I'm not sure what
> you're asking about index size, but the number of indexes you have
> will negatively impact your write performance.  Indexes generally
> increase the performance of queries.
>
>   The thing to be aware of when using SearchableModel is that it uses
> a ListProperty to index the search terms.  There are some caveats
> around ListProperty and indexes, these are discussed in the docs.
>
>    http://code.google.com/appengine/docs/python/datastore/queries.html#B...
>
>   You can also find some discussion of how the datastore works in the
> articles.  These can be quite useful in improving your understanding.
>
>    http://code.google.com/appengine/articles/datastore/overview.html
>
> Robert
>
> On Tue, May 24, 2011 at 17:24, yamadaag <edo808...@gmail.com> wrote:
> > Hello!
>
> > I'm creating a web-app on Google App Engine/Python now.
> > I use searchableModel to search entities from datastore, and I'm
> > wondering how does the number of entities or size of indexes would
> > affect searching speed.
> > Does anyone know about it, or knows where I can see the pages/
> > documents about it?
>
> > E.Yamada
>
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