Also note that bags can be more efficient for adding items to the list. Since a bag can have duplicates, adding an item to the list always succeeds, even if the collection is lazy and not initialized yet. In the case of a lazy Set, the entire collection must be loaded to make sure that you aren't adding a duplicate.
Bags are not horrible, you just have to understand the semantics. On Thu, Feb 12, 2009 at 12:04 PM, antoschka <[email protected]> wrote: > > Hi, ofcourse I do not name the properties like that. I use well > defined naming conventions with self speaking names. > > 1. Well, i just thought a missing index (which is the case for bags) > would influence searching for items > 2, I read some of it and found sentences like: > "Bags are the worst case. Since a bag permits duplicate element values > and has no index column, no primary key may be defined." - thats why I > asked later they mentined in an other context: "Just before you ditch > bags forever, there is a particular case in which bags (and also > lists) are much more performant than sets. For a collection with > inverse="true" (the standard bidirectional one-to-many relationship > idiom, for example) we can add elements to a bag or list without > needing to initialize (fetch) the bag elements!" > > 4. ok I will reduce it! > 5. the thing is I really love to use the stuff preseneted here: > blogs.msdn.com/devdev/archive/2006/06/30/652802.aspx > They are ideal for working with large lists and very performant. At > the moment I have to convert them all the time. That's why I was > asking > > Thanks for feedback > > antoschka > > > On 12 Feb., 18:53, Fabio Maulo <[email protected]> wrote: > > 2009/2/12 antoschka <[email protected]> > > > > > > > > > The Performance is a desaster! > > > > Your property-naming and composite-poid too. > > 1. That is not the problem. The real problem, probably, is the amount of > > data you uploading. > > 2. The reference is a good place where starthttp:// > nhforge.org/doc/nh/en/index.html#performance > > 3. see solution of point 2 > > 4. Yes! you should reduce it to one _no_ business meaning value. > > 5. No. Collections are proxy; BTW "Program to an interface and not to an > > implementation" (by GOF) > > > > -- > > Fabio Maulo > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
