Haven't tried it, but I found that a class derived from Model with one attribute of type BlobProperty has the same baseline time as one with an empty StringListProperty. Further both of those are slightly faster then a Model with an single IntegerProperty. This makes sense as I wouldn't expect the BlobProperty to do anything with its data and I would expect StringListProperty to get no further then checking the number of items in the list in its processing.
On Oct 17, 7:25 am, David koblas <[EMAIL PROTECTED]> wrote: > That's at least interesting from an update standpoint. If I read that > correctly the biggest overhead is the DS Put operation, so the > optimization of moving everything to single entry ID/Key/Value stores > would cause problems during updates. Though as a difference I'm using > the Entity object directly not the Django Model abstraction. Was there > any noted performance differences with that test (eg. Are the *Property > bits using a lot of time) > > Josh Heitzman wrote: > > Seehttp://groups.google.com/group/google-appengine/browse_thread/thread/... > > regarding the mcycle consumption impact of having lots of fields. > > > On Oct 16, 9:11 pm, David koblas <[EMAIL PROTECTED]> wrote: > > >> I'm storing application preferences in the datastore, they come in a > >> variety of types. As I see it I've got three choices for implementation: > > >> * Name / Blob > >> -- "general" has a json encoded object of all of the sub-settings > >> * Name / ID / Lots of Fields > >> -- Where ID = "general" or "user" (etc.) and different fields in > >> each entity > >> * Name / ID / Key / Value > >> -- Where you query out all of the "user" settings and > >> re-construct an object from it. > > >> My gut feel is that #2 is preferable, since it avoids double encoding > >> the data and doing a query out of a large number of records in the later > >> case. > > >> Thanks, --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
