I've been experimenting with precompiled queries in my app using the second
recipe
on https://bitbucket.org/zzzeek/sqlalchemy/wiki/UsageRecipes/BakedQuery.
I'm seeing a big speed up, with pages 30-40% faster (my application has
graph structured content so some pages require ~100 items.) But I'm also
seeing an increase in the number of db requests as I've had to switch from:
model = session.query(Resource).get(uuid)
to:
@precompiled_query_builder(DBSession)
def _get_by_uuid_query():
session = DBSession()
return session.query(Resource).filter(Resource.rid ==
bindparam('rid'))
...
model = _get_by_uuid_query().params(rid=uuid).one()
I think this is due to the identity map not being used. Is there a way to
precompile queries for .get() and have the best of both?
Laurence
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