I haven't... I shall give that a go.

On 9 Sep, 21:07, Robert Kluin <robert.kl...@gmail.com> wrote:
> So have you removed the DateTimeProperty or changed it to a
> StringProperty to see if the performance improved?
>
> Robert
>
> On Thu, Sep 9, 2010 at 13:32, Christopher Staite
>
>
>
> <christophersta...@googlemail.com> wrote:
> > I've removed the ReferenceProperty (it wasn't really needed anyway)
> > I'm now just storing the id as an IntegerProperty.  This hasn't speed
> > things up at all.  I've managed to optimise it even further by looking
> > at every call I make, but these are still taking forever.  I think
> > it's because I have the DateTimeProperty's in there.  I am using
> > AppStats at the moment, that's how I know it's these calls that are
> > causing the issue.
>
> > Thanks, Chris.
>
> > On 9 Sep, 07:27, Fredrik Bonander <carl.fredrik.bonan...@gmail.com>
> > wrote:
> >> It's little off topic, but a good thing to know is that the 
> >> db.ReferanceProperty doesn't behave like in same fashion one migth think 
> >> (at least I didn't). Accessing the  ReferanceProperty will make a new call 
> >> against the datastore.
>
> >> A good you can do if you want look in to what's eating the CPU quota is to 
> >> use appstats.
>
> >>http://googleappengine.blogspot.com/2010/03/easy-performance-profilin...
>
> >> ..fredrik
>
> >> Sent from my iPad
>
> >> On 8 sep 2010, at 19.46, Eli Jones <eli.jo...@gmail.com> wrote:
>
> >> > One way to find out would be to just do a test.. create a model called 
> >> > PotMemberDeux and make pot = db.StringProperty() in that one.. then test 
> >> > how long those puts take by assigning pot="p" and use the same put code.
>
> >> > I'd guess that both of the puts referencing the same pot=p could be what 
> >> > is slowing it down.. granted, I don't use ReferenceProperty at all... 
> >> > so, what do I know..
>
> >> > On Wed, Sep 8, 2010 at 9:24 AM, Christopher Staite 
> >> > <christophersta...@googlemail.com> wrote:
> >> > Hi guys,
>
> >> > I've been trying write my first real application for the app engine.
> >> > After multiple re-writes I've finally got the hang of things.  I think
> >> > that I've got something efficient and correct.  However, it's still
> >> > not performing particularly quickly and I'd like to speed it up a
> >> > little more.
>
> >> > The main issue is that most calls have to place two entries into the
> >> > datastore:
>
> >> > class PotMember(db.Model):
> >> >        pot = db.ReferenceProperty(Pot)
> >> >        member_id = db.IntegerProperty()
> >> >        count = db.IntegerProperty()
> >> >        second_pot = db.BooleanProperty()
> >> >        purchase_time = db.DateTimeProperty(auto_now_add=True)
> >> >        process_time = db.DateTimeProperty(auto_now=True)
>
> >> > newMembers = []
> >> > newMembers.append(PotMember(pot=p, member_id=member_id, count=count,
> >> > second_pot=False))
> >> > newMembers.append(PotMember(pot=p, member_id=member_id,
> >> > count=second_count, second_pot=True))
> >> > db.put(newMembers)
>
> >> > This operation takes ~300-400ms, which is enough for App Engine to
> >> > complain that my application is executing too slowly and needs to be
> >> > "optimised".  What exactly is taking so long to place these entries?
> >> > Most other put() operations take ~10ms to complete.  Is it the use of
> >> > the DateTimeProperty or the use of the ReferenceProperty that is
> >> > slowing this call down?
>
> >> > Any help would be appreciated.
>
> >> > Many Thanks, Chris.
>
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