launchpad-dev team mailing list archive

[Julian Edwards <julian.edwards@xxxxxxxxxxxxx>]

On Tuesday 03 August 2010 12:17:42 Robert Collins wrote:
> On Tue, Aug 3, 2010 at 11:11 PM, Julian Edwards
> 
> <julian.edwards@xxxxxxxxxxxxx> wrote:
> > So I guess the question is, does allmembers have to be a property?  It
> > sounds like it needs to be a method to me.
> 
> Well, allmembers isn't the problem: its the other properties that are
> the problem :). If we make them all into methods so that you have to
> ask for them directly, then the API will be fast, but the equivalent
> web page may still be slow if it actually has to call the methods
> because of what its showing.

I get your point, but my point is that everything else is getting the data 
whether it wants it or not.  This contributes to the overall slow-down of LP 
through increased database load.

> Handwaving: I'd like to have a flexible way of saying "I need these
> attributes (x, y,z) of the members of this collection
> (some-GenericCollection-subclass)" and have all the needed related sql
> expressions banged on automatically, then delivered as a result set of
> the right objects, with those related things precached.
> 
> Short term, doing what code does and manually decorating with a
> caching object may be the only sane way forward - we can probably make
> that pretty programmer efficient with some care; long term - well, see
> the handwaving, and I have some BigPicture ideas about how we talk to
> persistent storage etc which may be interesting to pursue, but not
> until we've got the fundamentals pinned down: scalability,
> responsiveness, transparency in our production environment.

Looking forward to it!

J